{ "instance": { "fbss-10k_20201231.htm": { "axisCustom": 0, "axisStandard": 32, "contextCount": 438, "dts": { "calculationLink": { "local": [ "fbss-20201231_cal.xml" ] }, "definitionLink": { "local": [ "fbss-20201231_def.xml" ], "remote": [ "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-eedm-def-2020-01-31.xml", "http://xbrl.fasb.org/srt/2020/elts/srt-eedm1-def-2020-01-31.xml" ] }, "inline": { "local": [ "fbss-10k_20201231.htm" ] }, "labelLink": { "local": [ "fbss-20201231_lab.xml" ], "remote": [ "https://xbrl.sec.gov/dei/2020/dei-doc-2020-01-31.xml", "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-doc-2020-01-31.xml", "http://xbrl.fasb.org/srt/2020/elts/srt-doc-2020-01-31.xml" ] }, "presentationLink": { "local": [ "fbss-20201231_pre.xml" ] }, "referenceLink": { "remote": [ "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-ref-2020-01-31.xml", "http://xbrl.fasb.org/srt/2020/elts/srt-ref-2020-01-31.xml", "https://xbrl.sec.gov/dei/2020/dei-ref-2020-01-31.xml" ] }, "schema": { "local": [ "fbss-20201231.xsd" ], "remote": [ "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd", "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd", "http://www.xbrl.org/2003/xl-2003-12-31.xsd", "http://www.xbrl.org/2003/xlink-2003-12-31.xsd", "http://www.xbrl.org/2005/xbrldt-2005.xsd", "https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd", "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd", "https://xbrl.sec.gov/currency/2020/currency-2020-01-31.xsd", "https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd", "http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd", "https://xbrl.sec.gov/exch/2020/exch-2020-01-31.xsd", "http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd", "https://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd", "https://xbrl.sec.gov/sic/2020/sic-2020-01-31.xsd", "http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd", "http://www.xbrl.org/2006/ref-2006-02-27.xsd", "http://xbrl.fasb.org/srt/2020/elts/srt-types-2020-01-31.xsd", "http://xbrl.fasb.org/srt/2020/elts/srt-roles-2020-01-31.xsd", "https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2020/elts/us-roles-2020-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2020/elts/us-types-2020-01-31.xsd", "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd", "http://xbrl.fasb.org/us-gaap/2020/elts/us-parts-codification-2020-01-31.xsd" ] } }, "elementCount": 839, "entityCount": 1, "hidden": { "http://fasb.org/us-gaap/2020-01-31": 5, "http://www.tfb.bank/20201231": 3, "http://xbrl.sec.gov/dei/2020-01-31": 5, "total": 13 }, "keyCustom": 73, "keyStandard": 515, "memberCustom": 27, "memberStandard": 59, "nsprefix": "fbss", "nsuri": "http://www.tfb.bank/20201231", "report": { "R1": { "firstAnchor": { "ancestors": [ "p", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentType", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "document", "isDefault": "true", "longName": "100000 - Document - Document and Entity Information", "role": "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation", "shortName": "Document and Entity Information", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentType", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R10": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100090 - Disclosure - Nature of Banking Activities and Significant Accounting Policies", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPolicies", "shortName": "Nature of Banking Activities and Significant Accounting Policies", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R100": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:LeaseCostTableTextBlock", "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseLiability", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "101000 - Disclosure - Leases - Schedule of Information about Leases (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails", "shortName": "Leases - Schedule of Information about Leases (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:LeaseCostTableTextBlock", "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:OperatingLeaseRightOfUseAsset", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R101": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "101010 - Disclosure - Leases - Maturities of Lease Liabilities (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails", "shortName": "Leases - Maturities of Lease Liabilities (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R11": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100100 - Disclosure - Securities", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecurities", "shortName": "Securities", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R12": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LoansNotesTradeAndOtherReceivablesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100110 - Disclosure - Loans and Allowance for Loan Losses", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLosses", "shortName": "Loans and Allowance for Loan Losses", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LoansNotesTradeAndOtherReceivablesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R13": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100120 - Disclosure - Related Party Transactions", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureRelatedPartyTransactions", "shortName": "Related Party Transactions", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RelatedPartyTransactionsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R14": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100130 - Disclosure - Premises and Equipment, Net", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNet", "shortName": "Premises and Equipment, Net", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R15": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DepositLiabilitiesDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100140 - Disclosure - Deposits", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDeposits", "shortName": "Deposits", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DepositLiabilitiesDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R16": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100150 - Disclosure - Employee Benefit Plans", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlans", "shortName": "Employee Benefit Plans", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R17": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "fbss:DividendReinvestmentAndStockPurchasePlanTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100160 - Disclosure - Dividend Reinvestment and Stock Purchase Plan", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDividendReinvestmentAndStockPurchasePlan", "shortName": "Dividend Reinvestment and Stock Purchase Plan", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "fbss:DividendReinvestmentAndStockPurchasePlanTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R18": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100170 - Disclosure - Commitments and Contingent Liabilities", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilities", "shortName": "Commitments and Contingent Liabilities", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R19": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100180 - Disclosure - Income Taxes", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxes", "shortName": "Income Taxes", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R2": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CashAndDueFromBanks", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100010 - Statement - Consolidated Balance Sheets", "role": "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets", "shortName": "Consolidated Balance Sheets", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:FederalFundsSold", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R20": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100190 - Disclosure - Earnings Per Share", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShare", "shortName": "Earnings Per Share", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R21": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100200 - Disclosure - Share-based Compensation", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensation", "shortName": "Share-based Compensation", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R22": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FederalHomeLoanBankAdvancesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100210 - Disclosure - Federal Home Loan Bank Advances and Other Borrowings", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowings", "shortName": "Federal Home Loan Bank Advances and Other Borrowings", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FederalHomeLoanBankAdvancesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R23": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RestrictionsOnDividendsLoansAndAdvancesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100220 - Disclosure - Dividend Limitations on Affiliate Bank", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDividendLimitationsOnAffiliateBank", "shortName": "Dividend Limitations on Affiliate Bank", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RestrictionsOnDividendsLoansAndAdvancesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R24": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "fbss:FinancialInstrumentsWithOffBalanceSheetRiskTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100230 - Disclosure - Financial Instruments with Off-Balance Sheet Risk", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRisk", "shortName": "Financial Instruments with Off-Balance Sheet Risk", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "fbss:FinancialInstrumentsWithOffBalanceSheetRiskTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R25": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100240 - Disclosure - Derivative Instruments and Hedging Activities", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivities", "shortName": "Derivative Instruments and Hedging Activities", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R26": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100250 - Disclosure - Accumulated Other Comprehensive Income (Loss)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLoss", "shortName": "Accumulated Other Comprehensive Income (Loss)", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R27": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100260 - Disclosure - Fair Value Measurements", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurements", "shortName": "Fair Value Measurements", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R28": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OtherOperatingIncomeAndExpenseTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100270 - Disclosure - Other Operating Expenses", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpenses", "shortName": "Other Operating Expenses", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:OtherOperatingIncomeAndExpenseTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R29": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ConcentrationRiskDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100280 - Disclosure - Concentration Risk", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureConcentrationRisk", "shortName": "Concentration Risk", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ConcentrationRiskDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R3": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:CommonStockParOrStatedValuePerShare", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD_xbrlishares", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100020 - Statement - Consolidated Balance Sheets (Parenthetical)", "role": "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical", "shortName": "Consolidated Balance Sheets (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:CommonStockParOrStatedValuePerShare", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD_xbrlishares", "xsiNil": "false" } }, "R30": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100290 - Disclosure - Capital Requirements", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirements", "shortName": "Capital Requirements", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R31": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DebtDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100300 - Disclosure - Junior Subordinated Debt", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebt", "shortName": "Junior Subordinated Debt", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DebtDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R32": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100310 - Disclosure - Parent Company Only Financial Statements", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatements", "shortName": "Parent Company Only Financial Statements", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R33": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AffordableHousingProgramTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100320 - Disclosure - Investment in Affordable Housing Projects", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjects", "shortName": "Investment in Affordable Housing Projects", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AffordableHousingProgramTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R34": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeOperatingLeasesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100330 - Disclosure - Leases", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeases", "shortName": "Leases", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LesseeOperatingLeasesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R35": { "firstAnchor": { "ancestors": [ "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BusinessCombinationsPolicy", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100340 - Disclosure - Nature of Banking Activities and Significant Accounting Policies (Policies)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies", "shortName": "Nature of Banking Activities and Significant Accounting Policies (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BusinessCombinationsPolicy", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R36": { "firstAnchor": { "ancestors": [ "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DebtSecuritiesAvailableForSaleTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100350 - Disclosure - Securities (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesTables", "shortName": "Securities (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DebtSecuritiesAvailableForSaleTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R37": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100360 - Disclosure - Loans and Allowance for Loan Losses (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesTables", "shortName": "Loans and Allowance for Loan Losses (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R38": { "firstAnchor": { "ancestors": [ "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100370 - Disclosure - Premises and Equipment, Net (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetTables", "shortName": "Premises and Equipment, Net (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PropertyPlantAndEquipmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R39": { "firstAnchor": { "ancestors": [ "us-gaap:DepositLiabilitiesDisclosuresTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:TimeDepositMaturitiesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100380 - Disclosure - Deposits (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsTables", "shortName": "Deposits (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:DepositLiabilitiesDisclosuresTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:TimeDepositMaturitiesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R4": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:InterestAndFeeIncomeLoansAndLeases", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100030 - Statement - Consolidated Statements of Operations", "role": "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations", "shortName": "Consolidated Statements of Operations", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:InterestIncomeSecuritiesTaxable", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R40": { "firstAnchor": { "ancestors": [ "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100390 - Disclosure - Employee Benefit Plans (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansTables", "shortName": "Employee Benefit Plans (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R41": { "firstAnchor": { "ancestors": [ "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100400 - Disclosure - Income Taxes (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesTables", "shortName": "Income Taxes (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R42": { "firstAnchor": { "ancestors": [ "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfWeightedAverageNumberOfSharesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100410 - Disclosure - Earnings Per Share (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareTables", "shortName": "Earnings Per Share (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfWeightedAverageNumberOfSharesTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R43": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100420 - Disclosure - Share-based Compensation (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationTables", "shortName": "Share-based Compensation (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R44": { "firstAnchor": { "ancestors": [ "us-gaap:FederalHomeLoanBankAdvancesDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfFederalHomeLoanBankAdvancesByBranchOfFHLBBankTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100430 - Disclosure - Federal Home Loan Bank Advances and Other Borrowings (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsTables", "shortName": "Federal Home Loan Bank Advances and Other Borrowings (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:FederalHomeLoanBankAdvancesDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfFederalHomeLoanBankAdvancesByBranchOfFHLBBankTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R45": { "firstAnchor": { "ancestors": [ "fbss:FinancialInstrumentsWithOffBalanceSheetRiskTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfFairValueOffBalanceSheetRisksTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100440 - Disclosure - Financial Instruments with Off-Balance Sheet Risk (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskTables", "shortName": "Financial Instruments with Off-Balance Sheet Risk (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "fbss:FinancialInstrumentsWithOffBalanceSheetRiskTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfFairValueOffBalanceSheetRisksTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R46": { "firstAnchor": { "ancestors": [ "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100450 - Disclosure - Derivative Instruments and Hedging Activities (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesTables", "shortName": "Derivative Instruments and Hedging Activities (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R47": { "firstAnchor": { "ancestors": [ "us-gaap:ComprehensiveIncomeNoteTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100460 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossTables", "shortName": "Accumulated Other Comprehensive Income (Loss) (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:ComprehensiveIncomeNoteTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R48": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100470 - Disclosure - Fair Value Measurements (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsTables", "shortName": "Fair Value Measurements (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R49": { "firstAnchor": { "ancestors": [ "us-gaap:OtherOperatingIncomeAndExpenseTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfOtherOperatingCostAndExpenseByComponentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100480 - Disclosure - Other Operating Expenses (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesTables", "shortName": "Other Operating Expenses (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:OtherOperatingIncomeAndExpenseTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfOtherOperatingCostAndExpenseByComponentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R5": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100040 - Statement - Consolidated Statements of Comprehensive Income", "role": "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome", "shortName": "Consolidated Statements of Comprehensive Income", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R50": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100490 - Disclosure - Capital Requirements (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsTables", "shortName": "Capital Requirements (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R51": { "firstAnchor": { "ancestors": [ "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "srt:ScheduleOfCondensedBalanceSheetTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100500 - Disclosure - Parent Company Only Financial Statements (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsTables", "shortName": "Parent Company Only Financial Statements (Tables)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "srt:ScheduleOfCondensedBalanceSheetTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R52": { "firstAnchor": { "ancestors": [ "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LeaseCostTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100510 - Disclosure - Leases (Tables)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesTables", "shortName": "Leases (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "us-gaap:LesseeOperatingLeasesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LeaseCostTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R53": { "firstAnchor": { "ancestors": [ "p", "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "INF", "first": true, "lang": null, "name": "fbss:NumberOfBankingOffices", "reportCount": 1, "unique": true, "unitRef": "U_fbssOffice", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100520 - Disclosure - Nature of Banking Activities and Significant Accounting Policies - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails", "shortName": "Nature of Banking Activities and Significant Accounting Policies - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "INF", "first": true, "lang": null, "name": "fbss:NumberOfBankingOffices", "reportCount": 1, "unique": true, "unitRef": "U_fbssOffice", "xsiNil": "false" } }, "R54": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:DebtSecuritiesAvailableForSaleTableTextBlock", "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100530 - Disclosure - Securities - Summary of Amortized Cost and Fair Value of Securities Available for Sale, with Unrealized Gains and Losses (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails", "shortName": "Securities - Summary of Amortized Cost and Fair Value of Securities Available for Sale, with Unrealized Gains and Losses (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:DebtSecuritiesAvailableForSaleTableTextBlock", "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R55": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100540 - Disclosure - Securities - Summary of Amortized Cost and Fair Value of Securities Available for Sale, by Contractual Maturity (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails", "shortName": "Securities - Summary of Amortized Cost and Fair Value of Securities Available for Sale, by Contractual Maturity (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R56": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100550 - Disclosure - Securities - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails", "shortName": "Securities - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "INF", "lang": null, "name": "us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions", "reportCount": 1, "unique": true, "unitRef": "U_fbssSecurity", "xsiNil": "false" } }, "R57": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100560 - Disclosure - Securities - Schedule of Securities with Gross Unrealized Losses and Fair value, Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails", "shortName": "Securities - Schedule of Securities with Gross Unrealized Losses and Fair value, Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R58": { "firstAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "INF", "first": true, "lang": null, "name": "fbss:NumberOfTDRLoansOutstanding", "reportCount": 1, "unique": true, "unitRef": "U_fbssLoan", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100570 - Disclosure - Loans and Allowance for Loan Losses - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails", "shortName": "Loans and Allowance for Loan Losses - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "INF", "first": true, "lang": null, "name": "fbss:NumberOfTDRLoansOutstanding", "reportCount": 1, "unique": true, "unitRef": "U_fbssLoan", "xsiNil": "false" } }, "R59": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:LoansAndLeasesReceivableAllowance", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100580 - Disclosure - Loans and Allowance for Loan Losses - Schedule of Allowance for Loan Losses by Portfolio Segment (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "shortName": "Loans and Allowance for Loan Losses - Schedule of Allowance for Loan Losses by Portfolio Segment (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20171231", "decimals": "-3", "lang": null, "name": "us-gaap:LoansAndLeasesReceivableAllowance", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R6": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100050 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical)", "role": "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncomeParenthetical", "shortName": "Consolidated Statements of Comprehensive Income (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R60": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:LoansAndLeasesReceivableGrossCarryingAmount", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100590 - Disclosure - Loans and Allowance for Loan Losses - Schedule of Loans by Credit Quality Indicators (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails", "shortName": "Loans and Allowance for Loan Losses - Schedule of Loans by Credit Quality Indicators (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:FinancingReceivableCreditQualityIndicatorsTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapInternalCreditAssessmentAxis_us-gaapPassMember_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:LoansAndLeasesReceivableGrossCarryingAmount", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R61": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:PastDueFinancingReceivablesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FinancingReceivableRecordedInvestmentPastDue", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100600 - Disclosure - Loans and Allowance for Loan Losses - Schedule of Past Due Status of Loans (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails", "shortName": "Loans and Allowance for Loan Losses - Schedule of Past Due Status of Loans (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:PastDueFinancingReceivablesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FinancingReceivableRecordedInvestmentPastDue", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R62": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ImpairedFinancingReceivableRecordedInvestment", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100610 - Disclosure - Loans and Allowance for Loan Losses - Schedule of Impaired Loans by Portfolio Segment (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails", "shortName": "Loans and Allowance for Loan Losses - Schedule of Impaired Loans by Portfolio Segment (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ImpairedFinancingReceivableRecordedInvestment", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R63": { "firstAnchor": { "ancestors": [ "us-gaap:TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock", "p", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20190101_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:FinancingReceivableModificationsNumberOfContracts2", "reportCount": 1, "unitRef": "U_fbssLoan", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100620 - Disclosure - Loans and Allowance for Loan Losses - Summary of Modification Classified Troubled Debt Restructuring (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesSummaryOfModificationClassifiedTroubledDebtRestructuringDetails", "shortName": "Loans and Allowance for Loan Losses - Summary of Modification Classified Troubled Debt Restructuring (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapFinancingReceivablePortfolioSegmentAxis_us-gaapCommercialPortfolioSegmentMember_20200101_20201231", "decimals": "INF", "lang": null, "name": "us-gaap:FinancingReceivableModificationsNumberOfContracts2", "reportCount": 1, "unique": true, "unitRef": "U_fbssLoan", "xsiNil": "false" } }, "R64": { "firstAnchor": { "ancestors": [ "p", "us-gaap:RelatedPartyTransactionsDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:LoansAndLeasesReceivableRelatedParties", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100630 - Disclosure - Related Party Transactions - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetails", "shortName": "Related Party Transactions - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:RelatedPartyTransactionsDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:LoansAndLeasesReceivableRelatedParties", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R65": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:PropertyPlantAndEquipmentTextBlock", "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:PropertyPlantAndEquipmentGross", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100640 - Disclosure - Premises and Equipment, Net - Cost and Accumulated Depreciation of Premises and Equipment (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails", "shortName": "Premises and Equipment, Net - Cost and Accumulated Depreciation of Premises and Equipment (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:PropertyPlantAndEquipmentTextBlock", "us-gaap:PropertyPlantAndEquipmentDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:PropertyPlantAndEquipmentGross", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R66": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DepreciationAndAmortization", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100650 - Disclosure - Premises and Equipment, Net - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetAdditionalInformationDetails", "shortName": "Premises and Equipment, Net - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": null }, "R67": { "firstAnchor": { "ancestors": [ "p", "us-gaap:DepositLiabilitiesDisclosuresTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:TimeDepositsAtOrAboveFDICInsuranceLimit", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100660 - Disclosure - Deposits - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsAdditionalInformationDetails", "shortName": "Deposits - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:DepositLiabilitiesDisclosuresTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:TimeDepositsAtOrAboveFDICInsuranceLimit", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R68": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:TimeDepositMaturitiesTableTextBlock", "us-gaap:DepositLiabilitiesDisclosuresTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:TimeDepositMaturitiesYearOne", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100670 - Disclosure - Deposits - Scheduled Maturities of Time Deposits (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails", "shortName": "Deposits - Scheduled Maturities of Time Deposits (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:TimeDepositMaturitiesTableTextBlock", "us-gaap:DepositLiabilitiesDisclosuresTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:TimeDepositMaturitiesYearOne", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R69": { "firstAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "fbss:DefinedContributionPlanMinimumAgeToParticipateInDefinedContributionPlan", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100680 - Disclosure - Employee Benefit Plans - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails", "shortName": "Employee Benefit Plans - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "fbss:DefinedContributionPlanMinimumAgeToParticipateInDefinedContributionPlan", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R7": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20171231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:StockholdersEquity", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100060 - Statement - Consolidated Statements of Changes in Shareholders' Equity", "role": "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity", "shortName": "Consolidated Statements of Changes in Shareholders' Equity", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapStatementEquityComponentsAxis_us-gaapCommonStockIncludingAdditionalPaidInCapitalMember_20171231", "decimals": "-3", "lang": null, "name": "us-gaap:StockholdersEquity", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R70": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100690 - Disclosure - Employee Benefit Plans - Schedule of Supplemental Executive Retirement Plan (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails", "shortName": "Employee Benefit Plans - Schedule of Supplemental Executive Retirement Plan (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock", "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapRetirementPlanTypeAxis_us-gaapSupplementalEmployeeRetirementPlanDefinedBenefitMember_20171231", "decimals": "-3", "lang": null, "name": "us-gaap:DefinedBenefitPlanBenefitObligation", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R71": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfExpectedBenefitPaymentsTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapRetirementPlanTypeAxis_us-gaapSupplementalEmployeeRetirementPlanDefinedBenefitMember_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100700 - Disclosure - Employee Benefit Plans - Schedule of Estimated Future Benefit Payments (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfEstimatedFutureBenefitPaymentsDetails", "shortName": "Employee Benefit Plans - Schedule of Estimated Future Benefit Payments (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfExpectedBenefitPaymentsTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapRetirementPlanTypeAxis_us-gaapSupplementalEmployeeRetirementPlanDefinedBenefitMember_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R72": { "firstAnchor": { "ancestors": [ "p", "fbss:DividendReinvestmentAndStockPurchasePlanTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "INF", "first": true, "lang": null, "name": "fbss:DividendReinvestmentPlanPercentageOfMarketPriceForPurchasesIntoPlan", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100710 - Disclosure - Dividend Reinvestment and Stock Purchase Plan - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDividendReinvestmentAndStockPurchasePlanAdditionalInformationDetails", "shortName": "Dividend Reinvestment and Stock Purchase Plan - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "fbss:DividendReinvestmentAndStockPurchasePlanTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "INF", "first": true, "lang": null, "name": "fbss:DividendReinvestmentPlanPercentageOfMarketPriceForPurchasesIntoPlan", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" } }, "R73": { "firstAnchor": { "ancestors": [ "p", "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "INF", "first": true, "lang": null, "name": "fbss:OtherCommitmentsNumberOfDataProcessingContractualObligations", "reportCount": 1, "unique": true, "unitRef": "U_fbssContract", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100720 - Disclosure - Commitments and Contingent Liabilities - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails", "shortName": "Commitments and Contingent Liabilities - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "INF", "first": true, "lang": null, "name": "fbss:OtherCommitmentsNumberOfDataProcessingContractualObligations", "reportCount": 1, "unique": true, "unitRef": "U_fbssContract", "xsiNil": "false" } }, "R74": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100730 - Disclosure - Income Taxes - Net Deferred Tax Assets (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails", "shortName": "Income Taxes - Net Deferred Tax Assets (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "us-gaap:IncomeTaxDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R75": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CurrentIncomeTaxExpenseBenefit", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100740 - Disclosure - Income Taxes - Components of Income Tax Expense (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails", "shortName": "Income Taxes - Components of Income Tax Expense (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CurrentIncomeTaxExpenseBenefit", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R76": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100750 - Disclosure - Income Taxes - Reconciliation of Federal Statutory Tax Rate (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails", "shortName": "Income Taxes - Reconciliation of Federal Statutory Tax Rate (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R77": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfWeightedAverageNumberOfSharesTableTextBlock", "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "0", "first": true, "lang": null, "name": "us-gaap:WeightedAverageNumberOfSharesOutstandingBasic", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100760 - Disclosure - Earnings Per Share - Weighted Average Number of Shares Used in Computing Earnings Per Share (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareWeightedAverageNumberOfSharesUsedInComputingEarningsPerShareDetails", "shortName": "Earnings Per Share - Weighted Average Number of Shares Used in Computing Earnings Per Share (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfWeightedAverageNumberOfSharesTableTextBlock", "us-gaap:EarningsPerShareTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "0", "first": true, "lang": null, "name": "us-gaap:WeightedAverageNumberOfSharesOutstandingBasic", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" } }, "R78": { "firstAnchor": { "ancestors": [ "p", "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapAwardTypeAxis_us-gaapRestrictedStockMember_20201231", "decimals": "0", "first": true, "lang": null, "name": "us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100770 - Disclosure - Share-based Compensation - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails", "shortName": "Share-based Compensation - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapAwardTypeAxis_us-gaapRestrictedStockMember_20201231", "decimals": "0", "first": true, "lang": null, "name": "us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R79": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapAwardTypeAxis_us-gaapRestrictedStockMember_us-gaapPlanNameAxis_fbssStockIncentivePlanMember_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber", "reportCount": 1, "unitRef": "U_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100780 - Disclosure - Share-based Compensation - Unvested Restricted Shares (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails", "shortName": "Share-based Compensation - Unvested Restricted Shares (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapAwardTypeAxis_us-gaapRestrictedStockMember_us-gaapPlanNameAxis_fbssStockIncentivePlanMember_20181231", "decimals": "INF", "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" } }, "R8": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:OtherComprehensiveIncomeLossTax", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100070 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Parenthetical)", "role": "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical", "shortName": "Consolidated Statements of Changes in Shareholders' Equity (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "INF", "lang": null, "name": "fbss:IssuanceOfCommonStockUnvestedShares", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" } }, "R80": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapAwardTypeAxis_us-gaapPerformanceSharesMember_us-gaapPlanNameAxis_fbssStockIncentivePlanMember_20191231", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber", "reportCount": 1, "unitRef": "U_xbrlishares", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100790 - Disclosure - Share-based Compensation - Unvested Performance-Based Stock Units (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "shortName": "Share-based Compensation - Unvested Performance-Based Stock Units (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapAwardTypeAxis_us-gaapPerformanceSharesMember_us-gaapPlanNameAxis_fbssStockIncentivePlanMember_20181231", "decimals": "INF", "lang": null, "name": "us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber", "reportCount": 1, "unique": true, "unitRef": "U_xbrlishares", "xsiNil": "false" } }, "R81": { "firstAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapShortTermDebtTypeAxis_us-gaapLetterOfCreditMember_20201231", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100800 - Disclosure - Federal Home Loan Bank Advances and Other Borrowings - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails", "shortName": "Federal Home Loan Bank Advances and Other Borrowings - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapShortTermDebtTypeAxis_us-gaapLetterOfCreditMember_20201231", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R82": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfFederalHomeLoanBankAdvancesByBranchOfFHLBBankTextBlock", "us-gaap:FederalHomeLoanBankAdvancesDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100810 - Disclosure - Federal Home Loan Bank Advances and Other Borrowings - Schedule of Contractual Maturities of FHLB Advances (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsScheduleOfContractualMaturitiesOfFHLBAdvancesDetails", "shortName": "Federal Home Loan Bank Advances and Other Borrowings - Schedule of Contractual Maturities of FHLB Advances (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfFederalHomeLoanBankAdvancesByBranchOfFHLBBankTextBlock", "us-gaap:FederalHomeLoanBankAdvancesDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R83": { "firstAnchor": { "ancestors": [ "p", "us-gaap:RestrictionsOnDividendsLoansAndAdvancesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100820 - Disclosure - Dividend Limitations on Affiliate Bank - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDividendLimitationsOnAffiliateBankAdditionalInformationDetails", "shortName": "Dividend Limitations on Affiliate Bank - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:RestrictionsOnDividendsLoansAndAdvancesTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-5", "first": true, "lang": null, "name": "us-gaap:StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R84": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfFairValueOffBalanceSheetRisksTextBlock", "fbss:FinancialInstrumentsWithOffBalanceSheetRiskTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FairValueDisclosureOffbalanceSheetRisksAmountLiability", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100830 - Disclosure - Financial Instruments with Off-Balance Sheet Risk - Schedule of Contract Amounts Represent Credit Risk (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskScheduleOfContractAmountsRepresentCreditRiskDetails", "shortName": "Financial Instruments with Off-Balance Sheet Risk - Schedule of Contract Amounts Represent Credit Risk (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfFairValueOffBalanceSheetRisksTextBlock", "fbss:FinancialInstrumentsWithOffBalanceSheetRiskTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:FairValueDisclosureOffbalanceSheetRisksAmountLiability", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R85": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:InterestExpenseJuniorSubordinatedDebentures", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100840 - Disclosure - Derivative Instruments and Hedging Activities - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "shortName": "Derivative Instruments and Hedging Activities - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapDerivativeInstrumentRiskAxis_us-gaapInterestRateSwapMember_20200101_20201231", "decimals": null, "lang": "en-US", "name": "us-gaap:DerivativeMaturityDates", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R86": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock", "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapDerivativeInstrumentRiskAxis_fbssInterestRateSwapThrough2031Member_us-gaapDerivativeInstrumentsGainLossByHedgingRelationshipAxis_us-gaapCashFlowHedgingMember_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DerivativeNotionalAmount", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100850 - Disclosure - Derivative Instruments and Hedging Activities - Summary of Derivative Instruments (Details))", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails", "shortName": "Derivative Instruments and Hedging Activities - Summary of Derivative Instruments (Details))", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock", "us-gaap:DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapDerivativeInstrumentRiskAxis_fbssInterestRateSwapThrough2031Member_us-gaapDerivativeInstrumentsGainLossByHedgingRelationshipAxis_us-gaapCashFlowHedgingMember_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:DerivativeNotionalAmount", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R87": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20191231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:StockholdersEquity", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100860 - Disclosure - Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "shortName": "Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "us-gaap:ComprehensiveIncomeNoteTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20180101_20181231", "decimals": "-3", "lang": null, "name": "fbss:ReclassificationOfIncomeTaxEffectOfTaxCutsAndJobsActFromAccumulatedOtherComprehensiveIncomeLoss", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R88": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100870 - Disclosure - Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "shortName": "Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapFairValueByMeasurementFrequencyAxis_us-gaapFairValueMeasurementsRecurringMember_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R89": { "firstAnchor": { "ancestors": [ "span", "p", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapFairValueByFairValueHierarchyLevelAxis_us-gaapFairValueInputsLevel3Member_us-gaapFairValueByMeasurementFrequencyAxis_us-gaapFairValueMeasurementsNonrecurringMember_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "fbss:MinimumAgeOfAppraisalOfRealEstatePropertyForFairValueToBeConsideredLevel3", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100880 - Disclosure - Fair Value Measurements - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails", "shortName": "Fair Value Measurements - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "p", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapFairValueByFairValueHierarchyLevelAxis_us-gaapFairValueInputsLevel3Member_us-gaapFairValueByMeasurementFrequencyAxis_us-gaapFairValueMeasurementsNonrecurringMember_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "fbss:MinimumAgeOfAppraisalOfRealEstatePropertyForFairValueToBeConsideredLevel3", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R9": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "100080 - Statement - Consolidated Statements of Cash Flows", "role": "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows", "shortName": "Consolidated Statements of Cash Flows", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:GainLossOnSaleOfPropertyPlantEquipment", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R90": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapFairValueByFairValueHierarchyLevelAxis_us-gaapFairValueInputsLevel1Member_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:MortgagesHeldForSaleFairValueDisclosure", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100890 - Disclosure - Fair Value Measurements - Summary of Financial Assets Measured at Fair Value on a Nonrecurring Basis (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails", "shortName": "Fair Value Measurements - Summary of Financial Assets Measured at Fair Value on a Nonrecurring Basis (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:FairValueAssetsMeasuredOnNonrecurringBasisTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapFairValueByMeasurementFrequencyAxis_us-gaapFairValueMeasurementsNonrecurringMember_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:MortgagesHeldForSaleFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R91": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapFairValueByFairValueHierarchyLevelAxis_us-gaapFairValueInputsLevel3Member_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AssetsFairValueDisclosure", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100900 - Disclosure - Fair Value Measurements - Summary of Quantitative Information About Level 3 Fair Value Measurements (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails", "shortName": "Fair Value Measurements - Summary of Quantitative Information About Level 3 Fair Value Measurements (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapFairValueByFairValueHierarchyLevelAxis_us-gaapFairValueInputsLevel3Member_us-gaapFairValueByMeasurementFrequencyAxis_us-gaapFairValueMeasurementsNonrecurringMember_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:AssetsFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R92": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100910 - Disclosure - Fair Value Measurements - Schedule of Estimated Fair Values of Financial Instruments (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "shortName": "Fair Value Measurements - Schedule of Estimated Fair Values of Financial Instruments (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapFairValueByFairValueHierarchyLevelAxis_us-gaapFairValueInputsLevel1Member_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:CashAndCashEquivalentsFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R93": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfOtherOperatingCostAndExpenseByComponentTextBlock", "us-gaap:OtherOperatingIncomeAndExpenseTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:PostageExpense", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100920 - Disclosure - Other Operating Expenses - Schedule of Components Other Operating Expenses (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails", "shortName": "Other Operating Expenses - Schedule of Components Other Operating Expenses (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfOtherOperatingCostAndExpenseByComponentTextBlock", "us-gaap:OtherOperatingIncomeAndExpenseTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:PostageExpense", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R94": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_srtConsolidatedEntitiesAxis_srtSubsidiariesMember_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Capital", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100940 - Disclosure - Capital Requirements - Summary of Capital Amounts and Ratios (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails", "shortName": "Capital Requirements - Summary of Capital Amounts and Ratios (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "us-gaap:ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_srtConsolidatedEntitiesAxis_srtSubsidiariesMember_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:Capital", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R95": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:JuniorSubordinatedNotes", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100950 - Disclosure - Junior Subordinated Debt - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails", "shortName": "Junior Subordinated Debt - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:DebtDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_us-gaapLongtermDebtTypeAxis_fbssFloatingRateCapitalSecuritiesMember_us-gaapVariableRateAxis_us-gaapLondonInterbankOfferedRateLIBORMember_20200101_20201231", "decimals": "INF", "lang": null, "name": "us-gaap:DebtInstrumentBasisSpreadOnVariableRate1", "reportCount": 1, "unique": true, "unitRef": "U_xbrlipure", "xsiNil": "false" } }, "R96": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:CashAndDueFromBanks", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100960 - Disclosure - Parent Company Only Financial Statements - Schedule of Balance Sheets (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "shortName": "Parent Company Only Financial Statements - Schedule of Balance Sheets (Details)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "srt:ScheduleOfCondensedBalanceSheetTableTextBlock", "us-gaap:CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_srtConsolidatedEntitiesAxis_srtParentCompanyMember_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:CashAndDueFromBanks", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R97": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:InterestAndFeeIncomeLoansAndLeases", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100970 - Disclosure - Parent Company Only Financial Statements - Schedule of Statements of Operations (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails", "shortName": "Parent Company Only Financial Statements - Schedule of Statements of Operations (Details)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "srt:ScheduleOfCondensedIncomeStatementTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_srtConsolidatedEntitiesAxis_srtParentCompanyMember_20200101_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:InterestAndFeeIncomeLoansAndLeases", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R98": { "firstAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": "-3", "first": true, "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unitRef": "U_iso4217USD", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100980 - Disclosure - Parent Company Only Financial Statements - Schedule of Statements of Cash Flows (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "shortName": "Parent Company Only Financial Statements - Schedule of Statements of Cash Flows (Details)", "subGroupType": "parenthetical", "uniqueAnchor": { "ancestors": [ "p", "td", "tr", "table", "div", "srt:ScheduleOfCondensedCashFlowStatementTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_srtConsolidatedEntitiesAxis_srtParentCompanyMember_20200101_20201231", "decimals": "-3", "lang": null, "name": "us-gaap:ProfitLoss", "reportCount": 1, "unique": true, "unitRef": "U_iso4217USD", "xsiNil": "false" } }, "R99": { "firstAnchor": { "ancestors": [ "p", "us-gaap:AffordableHousingProgramTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AffordableHousingTaxCreditsCommitmentYearToBePaid", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "100990 - Disclosure - Investment in Affordable Housing Projects - Additional Information (Details)", "role": "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails", "shortName": "Investment in Affordable Housing Projects - Additional Information (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "p", "us-gaap:AffordableHousingProgramTextBlock", "body", "html" ], "baseRef": "fbss-10k_20201231.htm", "contextRef": "C_0001083643_20200101_20201231", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AffordableHousingTaxCreditsCommitmentYearToBePaid", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } } }, "segmentCount": 89, "tag": { "dei_AmendmentFlag": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.", "label": "Amendment Flag", "terseLabel": "Amendment Flag" } } }, "localname": "AmendmentFlag", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_CityAreaCode": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Area code of city", "label": "City Area Code", "terseLabel": "City Area Code" } } }, "localname": "CityAreaCode", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_CoverAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Cover page.", "label": "Cover [Abstract]" } } }, "localname": "CoverAbstract", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "xbrltype": "stringItemType" }, "dei_CurrentFiscalYearEndDate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "End date of current fiscal year in the format --MM-DD.", "label": "Current Fiscal Year End Date", "terseLabel": "Current Fiscal Year End Date" } } }, "localname": "CurrentFiscalYearEndDate", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "gMonthDayItemType" }, "dei_DocumentAnnualReport": { "auth_ref": [ "r747", "r748", "r749" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true only for a form used as an annual report.", "label": "Document Annual Report", "terseLabel": "Document Annual Report" } } }, "localname": "DocumentAnnualReport", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_DocumentFiscalPeriodFocus": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Fiscal period values are FY, Q1, Q2, and Q3. 1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY.", "label": "Document Fiscal Period Focus", "terseLabel": "Document Fiscal Period Focus" } } }, "localname": "DocumentFiscalPeriodFocus", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "fiscalPeriodItemType" }, "dei_DocumentFiscalYearFocus": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.", "label": "Document Fiscal Year Focus", "terseLabel": "Document Fiscal Year Focus" } } }, "localname": "DocumentFiscalYearFocus", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "gYearItemType" }, "dei_DocumentPeriodEndDate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is YYYY-MM-DD.", "label": "Document Period End Date", "terseLabel": "Document Period End Date" } } }, "localname": "DocumentPeriodEndDate", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "dateItemType" }, "dei_DocumentTransitionReport": { "auth_ref": [ "r750" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true only for a form used as a transition report.", "label": "Document Transition Report", "terseLabel": "Document Transition Report" } } }, "localname": "DocumentTransitionReport", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_DocumentType": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.", "label": "Document Type", "terseLabel": "Document Type" } } }, "localname": "DocumentType", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "submissionTypeItemType" }, "dei_EntityAddressAddressLine1": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Address Line 1 such as Attn, Building Name, Street Name", "label": "Entity Address Address Line1", "terseLabel": "Entity Address, Address Line One" } } }, "localname": "EntityAddressAddressLine1", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressCityOrTown": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Name of the City or Town", "label": "Entity Address City Or Town", "terseLabel": "Entity Address, City or Town" } } }, "localname": "EntityAddressCityOrTown", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressPostalZipCode": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Code for the postal or zip code", "label": "Entity Address Postal Zip Code", "terseLabel": "Entity Address, Postal Zip Code" } } }, "localname": "EntityAddressPostalZipCode", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressStateOrProvince": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Name of the state or province.", "label": "Entity Address State Or Province", "terseLabel": "Entity Address, State or Province" } } }, "localname": "EntityAddressStateOrProvince", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "stateOrProvinceItemType" }, "dei_EntityCentralIndexKey": { "auth_ref": [ "r751" ], "lang": { "en-us": { "role": { "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.", "label": "Entity Central Index Key", "terseLabel": "Entity Central Index Key" } } }, "localname": "EntityCentralIndexKey", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "centralIndexKeyItemType" }, "dei_EntityCommonStockSharesOutstanding": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.", "label": "Entity Common Stock Shares Outstanding", "terseLabel": "Entity Common Stock, Shares Outstanding" } } }, "localname": "EntityCommonStockSharesOutstanding", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "sharesItemType" }, "dei_EntityCurrentReportingStatus": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure.", "label": "Entity Current Reporting Status", "terseLabel": "Entity Current Reporting Status" } } }, "localname": "EntityCurrentReportingStatus", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains.", "label": "Entity [Domain]", "terseLabel": "Entity" } } }, "localname": "EntityDomain", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "dei_EntityEmergingGrowthCompany": { "auth_ref": [ "r751" ], "lang": { "en-us": { "role": { "documentation": "Indicate if registrant meets the emerging growth company criteria.", "label": "Entity Emerging Growth Company", "terseLabel": "Entity Emerging Growth Company" } } }, "localname": "EntityEmergingGrowthCompany", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntityFileNumber": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.", "label": "Entity File Number", "terseLabel": "Entity File Number" } } }, "localname": "EntityFileNumber", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "fileNumberItemType" }, "dei_EntityFilerCategory": { "auth_ref": [ "r751" ], "lang": { "en-us": { "role": { "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure.", "label": "Entity Filer Category", "terseLabel": "Entity Filer Category" } } }, "localname": "EntityFilerCategory", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "filerCategoryItemType" }, "dei_EntityIncorporationStateCountryCode": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Two-character EDGAR code representing the state or country of incorporation.", "label": "Entity Incorporation State Country Code", "terseLabel": "Entity Incorporation, State or Country Code" } } }, "localname": "EntityIncorporationStateCountryCode", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "edgarStateCountryItemType" }, "dei_EntityInteractiveDataCurrent": { "auth_ref": [ "r752" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).", "label": "Entity Interactive Data Current", "terseLabel": "Entity Interactive Data Current" } } }, "localname": "EntityInteractiveDataCurrent", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityPublicFloat": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant's most recently completed second fiscal quarter.", "label": "Entity Public Float", "terseLabel": "Entity Public Float" } } }, "localname": "EntityPublicFloat", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "monetaryItemType" }, "dei_EntityRegistrantName": { "auth_ref": [ "r751" ], "lang": { "en-us": { "role": { "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.", "label": "Entity Registrant Name", "terseLabel": "Entity Registrant Name" } } }, "localname": "EntityRegistrantName", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityShellCompany": { "auth_ref": [ "r751" ], "lang": { "en-us": { "role": { "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.", "label": "Entity Shell Company", "terseLabel": "Entity Shell Company" } } }, "localname": "EntityShellCompany", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntitySmallBusiness": { "auth_ref": [ "r751" ], "lang": { "en-us": { "role": { "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).", "label": "Entity Small Business", "terseLabel": "Entity Small Business" } } }, "localname": "EntitySmallBusiness", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_EntityTaxIdentificationNumber": { "auth_ref": [ "r751" ], "lang": { "en-us": { "role": { "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.", "label": "Entity Tax Identification Number", "terseLabel": "Entity Tax Identification Number" } } }, "localname": "EntityTaxIdentificationNumber", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "employerIdItemType" }, "dei_EntityVoluntaryFilers": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Indicate 'Yes' or 'No' if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.", "label": "Entity Voluntary Filers", "terseLabel": "Entity Voluntary Filers" } } }, "localname": "EntityVoluntaryFilers", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_EntityWellKnownSeasonedIssuer": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A.", "label": "Entity Well Known Seasoned Issuer", "terseLabel": "Entity Well-known Seasoned Issuer" } } }, "localname": "EntityWellKnownSeasonedIssuer", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "yesNoItemType" }, "dei_IcfrAuditorAttestationFlag": { "auth_ref": [ "r747", "r748", "r749" ], "lang": { "en-us": { "role": { "label": "Icfr Auditor Attestation Flag", "terseLabel": "ICFR Auditor Attestation Flag" } } }, "localname": "IcfrAuditorAttestationFlag", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "booleanItemType" }, "dei_LegalEntityAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The set of legal entities associated with a report.", "label": "Legal Entity [Axis]", "terseLabel": "Legal Entity" } } }, "localname": "LegalEntityAxis", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "dei_LocalPhoneNumber": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Local phone number for entity.", "label": "Local Phone Number", "terseLabel": "Local Phone Number" } } }, "localname": "LocalPhoneNumber", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "normalizedStringItemType" }, "dei_Security12bTitle": { "auth_ref": [ "r745" ], "lang": { "en-us": { "role": { "documentation": "Title of a 12(b) registered security.", "label": "Security12b Title", "terseLabel": "Title of 12(b) Security" } } }, "localname": "Security12bTitle", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "securityTitleItemType" }, "dei_SecurityExchangeName": { "auth_ref": [ "r746" ], "lang": { "en-us": { "role": { "documentation": "Name of the Exchange on which a security is registered.", "label": "Security Exchange Name", "terseLabel": "Security Exchange Name" } } }, "localname": "SecurityExchangeName", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "edgarExchangeCodeItemType" }, "dei_TradingSymbol": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Trading symbol of an instrument as listed on an exchange.", "label": "Trading Symbol", "terseLabel": "Trading Symbol" } } }, "localname": "TradingSymbol", "nsuri": "http://xbrl.sec.gov/dei/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DocumentDocumentAndEntityInformation" ], "xbrltype": "tradingSymbolItemType" }, "fbss_AccountingStandardsUpdate202004Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Accounting Standards Update 2020-04.", "label": "Accounting Standards Update202004 [Member]", "terseLabel": "ASU 2020-04 [Member]" } } }, "localname": "AccountingStandardsUpdate202004Member", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_AccruedInterestReceivableFairValueDisclosure": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10120.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "This element may be used in connection with the fair value disclosures for accrued interest receivable required in the footnote disclosures to the financial statements.", "label": "Accrued Interest Receivable Fair Value Disclosure", "terseLabel": "Accrued interest receivable" } } }, "localname": "AccruedInterestReceivableFairValueDisclosure", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "fbss_AdditionalSafeHarborContributionByEmployerPercent": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The percentage of additional safe harbor contribution made by employer.", "label": "Additional Safe Harbor Contribution By Employer Percent", "terseLabel": "Additional safe harbor contribution by employer, percent" } } }, "localname": "AdditionalSafeHarborContributionByEmployerPercent", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "fbss_AvailableForSaleIndividualSecuritiesContinuousUnrealizedLossPositionAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Available - for - sale individual securities, continuous unrealized loss position.", "label": "Available For Sale Individual Securities Continuous Unrealized Loss Position [Abstract]", "terseLabel": "Securities in Continuous Unrealized Loss Position [Abstract]" } } }, "localname": "AvailableForSaleIndividualSecuritiesContinuousUnrealizedLossPositionAbstract", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails" ], "xbrltype": "stringItemType" }, "fbss_BankingAndThriftDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Banking and thrift disclosure.", "label": "Banking And Thrift Disclosure [Abstract]" } } }, "localname": "BankingAndThriftDisclosureAbstract", "nsuri": "http://www.tfb.bank/20201231", "xbrltype": "stringItemType" }, "fbss_CapitalConservationBufferPercentage": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Capital conservation buffer percentage.", "label": "Capital Conservation Buffer Percentage", "terseLabel": "Bank's capital conservation buffer" } } }, "localname": "CapitalConservationBufferPercentage", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "fbss_CashPaymentsForAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Cash payments for:", "label": "Cash Payments For [Abstract]", "terseLabel": "Cash payments for:" } } }, "localname": "CashPaymentsForAbstract", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "fbss_CommonEquityTierOneCapitalRequiredForCapitalAdequacyToRiskWeightedAssets": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The minimum Common Equity Tier 1 risk based capital ratio (Common Equity Tier 1 capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.", "label": "Common Equity Tier One Capital Required For Capital Adequacy To Risk Weighted Assets", "terseLabel": "Minimum capital requirement ratio" } } }, "localname": "CommonEquityTierOneCapitalRequiredForCapitalAdequacyToRiskWeightedAssets", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "percentItemType" }, "fbss_CommonEquityTierOneCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Common Equity Tier 1 risk based capital ratio (Common Equity Tier 1 capital divided by risk weighted assets) required to be categorized as \"well capitalized\" under the regulatory framework for prompt corrective action.", "label": "Common Equity Tier One Capital Required To Be Well Capitalized To Risk Weighted Assets", "terseLabel": "Well capitalized under prompt corrective action provisions ratio" } } }, "localname": "CommonEquityTierOneCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "percentItemType" }, "fbss_CommonStockSharesNonVested": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Total number of shares of common stock held by shareholders that are nonvested. May be all or portion of the number of common shares issued. Does not include common shares that have been repurchased.", "label": "Common Stock Shares Non Vested", "terseLabel": "Common stock, unvested shares (in shares)" } } }, "localname": "CommonStockSharesNonVested", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "fbss_ConstructionAndLandMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Portfolio segment of the company's total financing receivables related to commercial receivables.", "label": "Construction And Land [Member]", "terseLabel": "Construction and Land [Member]" } } }, "localname": "ConstructionAndLandMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "domainItemType" }, "fbss_CoreDataProcessingMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The largest primary contractual obligation greater than one year for core data processing services with a third-party vendor.", "label": "Core Data Processing [Member]", "terseLabel": "Core Data Processing [Member]" } } }, "localname": "CoreDataProcessingMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_CreditQualityIndicatorsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Credit Quality Indicators [Abstract]", "label": "Credit Quality Indicators [Abstract]", "terseLabel": "Credit Quality Indicators [Abstract]" } } }, "localname": "CreditQualityIndicatorsAbstract", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails" ], "xbrltype": "stringItemType" }, "fbss_DebtInstrumentMaturityYear": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Debt instrument maturity year.", "label": "Debt Instrument Maturity Year", "terseLabel": "Maturity year" } } }, "localname": "DebtInstrumentMaturityYear", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "gYearItemType" }, "fbss_DebtInstrumentTermOfVariableRate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Term of the interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index.", "label": "Debt Instrument Term Of Variable Rate", "terseLabel": "Term of variable rate" } } }, "localname": "DebtInstrumentTermOfVariableRate", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "fbss_DebtSecuritiesAvailableForSaleUnrealizedLossPositionCarryingAmount": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Debt securities available for sale unrealized loss position carrying amount.", "label": "Debt Securities Available For Sale Unrealized Loss Position Carrying Amount", "terseLabel": "Unrealized loss position, carrying amount" } } }, "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPositionCarryingAmount", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "fbss_DefermentsPaymentGranted": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Deferments payment granted.", "label": "Deferments Payment Granted", "terseLabel": "Deferments payment granted" } } }, "localname": "DefermentsPaymentGranted", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "fbss_DeferredCompensationArrangementWithIndividualNumberOfDirectorsParticipatingInDeferredCompensationPlan": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The number of directors participating in the Director Deferred Compensation Plan during the period.", "label": "Deferred Compensation Arrangement With Individual Number Of Directors Participating In Deferred Compensation Plan", "terseLabel": "Number of directors participating in Deferred Compensation Plan" } } }, "localname": "DeferredCompensationArrangementWithIndividualNumberOfDirectorsParticipatingInDeferredCompensationPlan", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_DeferredCompensationArrangementWithIndividualNumberOfInstallmentsForContributions": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The number of installments available to participants to receive amounts contributed to their accounts under the deferred compensation arrangement.", "label": "Deferred Compensation Arrangement With Individual Number Of Installments For Contributions", "terseLabel": "Number of installments for contributions" } } }, "localname": "DeferredCompensationArrangementWithIndividualNumberOfInstallmentsForContributions", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_DeferredTaxAssetsInterestOnNonAccrualLoans": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10060.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences related to interest income on non-accrual loans.", "label": "Deferred Tax Assets Interest On Non Accrual Loans", "terseLabel": "Interest on nonaccrual loans" } } }, "localname": "DeferredTaxAssetsInterestOnNonAccrualLoans", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "fbss_DeferredTaxAssetsOtherRealEstateOwned": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10090.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from other real estate owned.", "label": "Deferred Tax Assets Other Real Estate Owned", "terseLabel": "OREO" } } }, "localname": "DeferredTaxAssetsOtherRealEstateOwned", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "fbss_DeferredTaxLiabilitiesSecuritiesAvailableForSale": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10030.0, "parentTag": "us-gaap_DeferredIncomeTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Deferred tax liabilities securities available for sale.", "label": "Deferred Tax Liabilities Securities Available For Sale", "terseLabel": "Securities available for sale" } } }, "localname": "DeferredTaxLiabilitiesSecuritiesAvailableForSale", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "fbss_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossDeferredTaxExpenseBenefit": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": 12140.0, "parentTag": "us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Deferred tax expense (benefit) relating to the accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).", "label": "Defined Benefit Plan Accumulated Other Comprehensive Income Loss Deferred Tax Expense Benefit", "negatedLabel": "Deferred tax expense" } } }, "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossDeferredTaxExpenseBenefit", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "fbss_DefinedContributionPlanEmployerMatchingContributionPercentOfMatchOnFirst6PercentOfDeferredCompensation": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percentage employer matches on the first 6% of the employee's deferred compensation.", "label": "Defined Contribution Plan Employer Matching Contribution Percent Of Match On First6 Percent Of Deferred Compensation", "terseLabel": "Employer matching contribution percentage on first 6% of deferred compensation" } } }, "localname": "DefinedContributionPlanEmployerMatchingContributionPercentOfMatchOnFirst6PercentOfDeferredCompensation", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "fbss_DefinedContributionPlanMinimumAgeToParticipateInDefinedContributionPlan": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Minimum age for an employee to participate in the defined contribution retirement plan, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Defined Contribution Plan Minimum Age To Participate In Defined Contribution Plan", "terseLabel": "Minimum age to participate" } } }, "localname": "DefinedContributionPlanMinimumAgeToParticipateInDefinedContributionPlan", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "fbss_DefinedContributionRetirementPlanMinimumHoursToParticipateInDefinedContributionPlan": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Defined contribution retirement plan minimum hours to participate in defined contribution plan.", "label": "Defined Contribution Retirement Plan Minimum Hours To Participate In Defined Contribution Plan", "terseLabel": "Minimum working hours to participate" } } }, "localname": "DefinedContributionRetirementPlanMinimumHoursToParticipateInDefinedContributionPlan", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_DerivativeNumberOfInstrumentsTerminated": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Derivative number of instruments terminated.", "label": "Derivative Number Of Instruments Terminated", "terseLabel": "Number of swap agreements terminated" } } }, "localname": "DerivativeNumberOfInstrumentsTerminated", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_DerivativeTermOfVariableRate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Term of the interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index.", "label": "Derivative Term Of Variable Rate", "terseLabel": "Term of variable rate" } } }, "localname": "DerivativeTermOfVariableRate", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "fbss_DiscountedAppraisedValueMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Discounted appraised value technique used to measure fair value.", "label": "Discounted Appraised Value [Member]", "terseLabel": "Appraised Values [Member]" } } }, "localname": "DiscountedAppraisedValueMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "domainItemType" }, "fbss_DividendReinvestmentAndStockPurchasePlanAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Dividend reinvestment and stock purchase plan.", "label": "Dividend Reinvestment And Stock Purchase Plan [Abstract]" } } }, "localname": "DividendReinvestmentAndStockPurchasePlanAbstract", "nsuri": "http://www.tfb.bank/20201231", "xbrltype": "stringItemType" }, "fbss_DividendReinvestmentAndStockPurchasePlanSharesAvailableForIssuance": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The number of shares available for future issuance under the DRSPP.", "label": "Dividend Reinvestment And Stock Purchase Plan Shares Available For Issuance", "terseLabel": "Shares available for issuance" } } }, "localname": "DividendReinvestmentAndStockPurchasePlanSharesAvailableForIssuance", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDividendReinvestmentAndStockPurchasePlanAdditionalInformationDetails" ], "xbrltype": "sharesItemType" }, "fbss_DividendReinvestmentAndStockPurchasePlanTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for the dividend reinvestment and stock purchase plan.", "label": "Dividend Reinvestment And Stock Purchase Plan [Text Block]", "terseLabel": "Dividend Reinvestment and Stock Purchase Plan" } } }, "localname": "DividendReinvestmentAndStockPurchasePlanTextBlock", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDividendReinvestmentAndStockPurchasePlan" ], "xbrltype": "textBlockItemType" }, "fbss_DividendReinvestmentPlanPercentageOfMarketPriceForPurchasesIntoPlan": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The percentage of market price of the Company's stock at which the dividend reinvestment plan allows participating shareholders to purchase shares through automatic reinvestment of dividends.", "label": "Dividend Reinvestment Plan Percentage Of Market Price For Purchases Into Plan", "terseLabel": "Percentage of market price of common stock for purchases into the plan" } } }, "localname": "DividendReinvestmentPlanPercentageOfMarketPriceForPurchasesIntoPlan", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDividendReinvestmentAndStockPurchasePlanAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "fbss_FederalHomeLoanBankAdvancesAmortizingBalance": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Outstanding amount of borrowing includes amortizing balance of federal home loan bank advances.", "label": "Federal Home Loan Bank Advances Amortizing Balance", "terseLabel": "FHLB outstanding includes amortizing balance" } } }, "localname": "FederalHomeLoanBankAdvancesAmortizingBalance", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "fbss_FederalHomeLoanBankAdvancesCreditAvailableAsPercentageOfQualifyingCollateral": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Amount of credit available as a percent of qualifying collateral in support of federal home loan bank advances.", "label": "Federal Home Loan Bank Advances Credit Available As Percentage Of Qualifying Collateral", "terseLabel": "Credit available as a percent of qualifying collateral" } } }, "localname": "FederalHomeLoanBankAdvancesCreditAvailableAsPercentageOfQualifyingCollateral", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "fbss_FederalReserveBankOfRichmondMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Borrowings from the Federal Reserve Bank, which are primarily used to cover shortages in the required reserve balance and also in times of liquidity shortages. The member institution executes a promissory note, which is generally collateralized by government securities to the Federal Reserve or loans.", "label": "Federal Reserve Bank Of Richmond [Member]", "terseLabel": "Federal Reserve Bank of Richmond [Member]" } } }, "localname": "FederalReserveBankOfRichmondMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_FinancialInstrumentsWithOffBalanceSheetRiskAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Financial Instruments With Off Balance Sheet Risk [Abstract]" } } }, "localname": "FinancialInstrumentsWithOffBalanceSheetRiskAbstract", "nsuri": "http://www.tfb.bank/20201231", "xbrltype": "stringItemType" }, "fbss_FinancialInstrumentsWithOffBalanceSheetRiskTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for the financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined) which are not recognized in the financial statements (off balance sheet) because they fail to meet some other criterion for recognition.", "label": "Financial Instruments With Off Balance Sheet Risk [Text Block]", "terseLabel": "Financial Instruments with Off-Balance Sheet Risk" } } }, "localname": "FinancialInstrumentsWithOffBalanceSheetRiskTextBlock", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRisk" ], "xbrltype": "textBlockItemType" }, "fbss_FinancingReceivableAmountOfLoansAuthorized": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Financing receivable amount of loans authorized.", "label": "Financing Receivable Amount Of Loans Authorized", "terseLabel": "Financing receivable amount of loans authorized" } } }, "localname": "FinancingReceivableAmountOfLoansAuthorized", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "fbss_FinancingReceivableModificationsNumberOfDefermentsLoans": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Financing receivable modifications number of deferments loans.", "label": "Financing Receivable Modifications Number Of Deferments Loans", "terseLabel": "Number of deferments loans" } } }, "localname": "FinancingReceivableModificationsNumberOfDefermentsLoans", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_FinancingReceivableNumberOfLoansAuthorized": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Financing receivable number of loans authorized.", "label": "Financing Receivable Number Of Loans Authorized", "terseLabel": "Financing receivable number of loans authorized" } } }, "localname": "FinancingReceivableNumberOfLoansAuthorized", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_FinancingReceivableNumberOfLoansForgiveness": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Financing receivable, number of loans, forgiveness.", "label": "Financing Receivable Number Of Loans Forgiveness", "terseLabel": "Financing receivable number of loans forgiveness" } } }, "localname": "FinancingReceivableNumberOfLoansForgiveness", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_FinancingReceivablePrincipalAmountOfLoansForgiveness": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Financing receivable, principal amount of loans, forgiveness.", "label": "Financing Receivable Principal Amount Of Loans Forgiveness", "terseLabel": "Financing receivable aggregate principal balance of loans forgiveness" } } }, "localname": "FinancingReceivablePrincipalAmountOfLoansForgiveness", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "fbss_FloatingRateCapitalSecuritiesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Floating Rate Capital Securities issued by the Company's wholly-owned Connecticut statutory business trust in a pooled capital securities offering (Trust II) on September 21, 2006.", "label": "Floating Rate Capital Securities [Member]", "terseLabel": "Floating Rate Capital Securities [Member]" } } }, "localname": "FloatingRateCapitalSecuritiesMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_FloatingRateJuniorSubordinatedDeferrableInterestDebenturesDue2036Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Borrowing that has a lower priority than senior instruments in event of liquidation of the entity's assets.", "label": "Floating Rate Junior Subordinated Deferrable Interest Debentures Due2036 [Member]", "terseLabel": "Floating Rate Junior Subordinated Deferrable Interest Debentures due 2036 [Member]" } } }, "localname": "FloatingRateJuniorSubordinatedDeferrableInterestDebenturesDue2036Member", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_ForfeitureOfCommonStockUnvestedValue": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Forfeiture of common stock unvested value.", "label": "Forfeiture Of Common Stock Unvested Value", "negatedLabel": "Forfeiture of common stock - unvested shares" } } }, "localname": "ForfeitureOfCommonStockUnvestedValue", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "fbss_ForfietureOfCommonStockUnvestedShares": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Forfieture of common stock unvested shares.", "label": "Forfieture Of Common Stock Unvested Shares", "terseLabel": "Forfeiture of common stock - unvested shares (in Shares)" } } }, "localname": "ForfietureOfCommonStockUnvestedShares", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical" ], "xbrltype": "sharesItemType" }, "fbss_FormerKeyEmployeeMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Former key employee who retired from the Company.", "label": "Former Key Employee [Member]", "terseLabel": "Former Key Employee [Member]" } } }, "localname": "FormerKeyEmployeeMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_FrequencyOfRepricing": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the frequency of repricing of securities.", "label": "Frequency Of Repricing", "terseLabel": "Frequency of repricing" } } }, "localname": "FrequencyOfRepricing", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "fbss_FurnitureAndFixturesAndEquipmentMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases. Equipment is tangible personal property used to produce goods and services.", "label": "Furniture And Fixtures And Equipment [Member]", "terseLabel": "Furniture and Equipment [Member]" } } }, "localname": "FurnitureAndFixturesAndEquipmentMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "fbss_ImpairedFinancingReceivableRelatedAllowanceAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Related Allowance [Abstract]", "label": "Impaired Financing Receivable Related Allowance [Abstract]", "terseLabel": "Related Allowance [Abstract]" } } }, "localname": "ImpairedFinancingReceivableRelatedAllowanceAbstract", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "stringItemType" }, "fbss_ImpairedLoansMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Loan securities that have been impaired", "label": "Impaired Loans [Member]", "terseLabel": "Impaired Loans [Member]" } } }, "localname": "ImpairedLoansMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "domainItemType" }, "fbss_ImpairedLoansNetFairValueDisclosure": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of impaired financing receivables for which there is a related allowance for credit losses.", "label": "Impaired Loans Net Fair Value Disclosure", "terseLabel": "Impaired loans, net" } } }, "localname": "ImpairedLoansNetFairValueDisclosure", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "fbss_IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10010.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before and extraordinary items, before equity in undistributed earnings of subsidiaries.", "label": "Income Loss Before Equity In Undistributed Earnings Of Subsidiaries", "totalLabel": "Income before equity in undistributed net income of subsidiaries" } } }, "localname": "IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails" ], "xbrltype": "monetaryItemType" }, "fbss_IncreaseDecreaseInNoninterestBearingCheckingInterestBearingCheckingSavingsAndMoneyMarketAccounts": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10040.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Increase (decrease) in noninterest-bearing checking, interest-bearing checking, savings and money market accounts.", "label": "Increase Decrease In Noninterest Bearing Checking Interest Bearing Checking Savings And Money Market Accounts", "terseLabel": "Increase (decrease) in noninterest-bearing checking, interest-bearing checking, savings and money market accounts" } } }, "localname": "IncreaseDecreaseInNoninterestBearingCheckingInterestBearingCheckingSavingsAndMoneyMarketAccounts", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "fbss_InterchangeIncome": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Interchange income.", "label": "Interchange Income", "terseLabel": "Net interchange income" } } }, "localname": "InterchangeIncome", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "fbss_InterchangeProcessingMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "A contractual obligation greater than one year for interchange processing services with a third-party vendor where the expense is based on interchange volume.", "label": "Interchange Processing [Member]", "terseLabel": "Interchange Processing [Member]" } } }, "localname": "InterchangeProcessingMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_InterestExpenseInterestRateSwaps": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of interest expense on interest rate swaps.", "label": "Interest Expense Interest Rate Swaps", "terseLabel": "Interest expense" } } }, "localname": "InterestExpenseInterestRateSwaps", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "fbss_InterestIncomeInterestRateSwaps": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "mount of interest income on interest rate swaps.", "label": "Interest Income Interest Rate Swaps", "terseLabel": "Interest income" } } }, "localname": "InterestIncomeInterestRateSwaps", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "fbss_InterestRateSwapThrough2020Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period.", "label": "Interest Rate Swap Through2020 [Member]", "terseLabel": "Interest Rate Swap through 9-15-2020 [Member]" } } }, "localname": "InterestRateSwapThrough2020Member", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "domainItemType" }, "fbss_InterestRateSwapThrough2022Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period.", "label": "Interest Rate Swap Through2022 [Member]", "terseLabel": "Interest Rate Swap through 2-12-2022 [Member]" } } }, "localname": "InterestRateSwapThrough2022Member", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "domainItemType" }, "fbss_InterestRateSwapThrough2025Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period.", "label": "Interest Rate Swap Through2025 [Member]", "terseLabel": "Interest Rate Swap through 4-9-2025 [Member]" } } }, "localname": "InterestRateSwapThrough2025Member", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "domainItemType" }, "fbss_InterestRateSwapThrough2031Member": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period.", "label": "Interest Rate Swap Through2031 [Member]", "terseLabel": "Interest Rate Swap through 6-15-2031 [Member]" } } }, "localname": "InterestRateSwapThrough2031Member", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "domainItemType" }, "fbss_InterestRateSwapsForCommercialLoansMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Forward based contracts to manage the interest rate risk related to three commercial loans, in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period.", "label": "Interest Rate Swaps For Commercial Loans [Member]", "terseLabel": "Interest Rate Swaps - Commercial Loans [Member]" } } }, "localname": "InterestRateSwapsForCommercialLoansMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_InterestRateSwapsOnJuniorSubordinatedDebtDueTwoThousandThirtySixMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Interest rate swaps on junior subordinated debt due two thousand thirty six.", "label": "Interest Rate Swaps On Junior Subordinated Debt Due Two Thousand Thirty Six [Member]", "terseLabel": "Interest Rate Swaps - Junior Subordinated Debt Due 2036 [Member]" } } }, "localname": "InterestRateSwapsOnJuniorSubordinatedDebtDueTwoThousandThirtySixMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_IssuanceOfCommonStockPerformanceBasedRestrictedStockShares": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Issuance of common stock performance based restricted stock shares.", "label": "Issuance Of Common Stock Performance Based Restricted Stock Shares", "terseLabel": "Issuance of common stock - performance-based restricted stock units (in shares)" } } }, "localname": "IssuanceOfCommonStockPerformanceBasedRestrictedStockShares", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical" ], "xbrltype": "sharesItemType" }, "fbss_IssuanceOfCommonStockPerformanceBasedRestrictedStockValue": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Issuance of common stock - performance-based restricted stock value.", "label": "Issuance Of Common Stock Performance Based Restricted Stock Value", "terseLabel": "Issuance of common stock - performance-based restricted stock units" } } }, "localname": "IssuanceOfCommonStockPerformanceBasedRestrictedStockValue", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "fbss_IssuanceOfCommonStockUnvestedShares": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Issuance of common stock unvested shares.", "label": "Issuance Of Common Stock Unvested Shares", "terseLabel": "Issuance of common stock - unvested shares (in shares)" } } }, "localname": "IssuanceOfCommonStockUnvestedShares", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical" ], "xbrltype": "sharesItemType" }, "fbss_IssuanceOfCommonStockUnvestedValue": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Value of vested shares issued during the period.", "label": "Issuance Of Common Stock Unvested Value", "terseLabel": "Issuance of common stock - unvested shares" } } }, "localname": "IssuanceOfCommonStockUnvestedValue", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "fbss_IssuanceOfCommonStockVestedShares": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of vested common shares issued during the period.", "label": "Issuance Of Common Stock Vested Shares", "terseLabel": "Issuance of common stock - vested shares (in shares)" } } }, "localname": "IssuanceOfCommonStockVestedShares", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical" ], "xbrltype": "sharesItemType" }, "fbss_IssuanceOfCommonStockVestedValue": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Value of vested shares issued during the period.", "label": "Issuance Of Common Stock Vested Value", "terseLabel": "Issuance of common stock - vested shares" } } }, "localname": "IssuanceOfCommonStockVestedValue", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "fbss_LineOfCreditWithCommercialBanksMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time, and under which borrowings outstanding may be either short-term or long-term, depending upon the particulars, inside the reporting entity's home country.", "label": "Line Of Credit With Commercial Banks [Member]", "terseLabel": "Line of Credit with Commercial Banks [Member]" } } }, "localname": "LineOfCreditWithCommercialBanksMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_ManagedServiceAgreementFees": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails": { "order": 10070.0, "parentTag": "us-gaap_OtherNoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fees charged on managed investment accounts and related assets.", "label": "Managed Service Agreement Fees", "terseLabel": "Managed service agreements" } } }, "localname": "ManagedServiceAgreementFees", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails" ], "xbrltype": "monetaryItemType" }, "fbss_MarketingAndBusinessDevelopmentExpense": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10090.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Marketing and business development expense.", "label": "Marketing And Business Development Expense", "terseLabel": "Marketing and business development" } } }, "localname": "MarketingAndBusinessDevelopmentExpense", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "fbss_MergerAgreementMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Merger agreement.", "label": "Merger Agreement [Member]", "terseLabel": "Merger Agreement [Member]" } } }, "localname": "MergerAgreementMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_MinimumAgeOfAppraisalOfRealEstatePropertyForFairValueToBeConsideredLevel3": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The minimum age of an appraisal of a real estate property for fair value to be considered Level 3.", "label": "Minimum Age Of Appraisal Of Real Estate Property For Fair Value To Be Considered Level3", "terseLabel": "Minimum age of appraisal of real estate property for fair value to be considered Level 3" } } }, "localname": "MinimumAgeOfAppraisalOfRealEstatePropertyForFairValueToBeConsideredLevel3", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "fbss_MortgageLoansHeldForSaleMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Mortgage loans held for sale.", "label": "Mortgage Loans Held For Sale [Member]", "terseLabel": "Mortgage Loans Held for Sale [Member]" } } }, "localname": "MortgageLoansHeldForSaleMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_NatureOfBankingActivitiesAndSignificantAccountingPoliciesLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Nature of banking activities and significant accounting policies.", "label": "Nature Of Banking Activities And Significant Accounting Policies [Line Items]", "terseLabel": "Nature of Banking Activities and Significant Accounting Policies [Line Items]" } } }, "localname": "NatureOfBankingActivitiesAndSignificantAccountingPoliciesLineItems", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "fbss_NatureOfBankingActivitiesAndSignificantAccountingPoliciesTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Nature of banking activities and significant accounting policies table.", "label": "Nature Of Banking Activities And Significant Accounting Policies [Table]", "terseLabel": "Nature Of Banking Activities And Significant Accounting Policies [Table]" } } }, "localname": "NatureOfBankingActivitiesAndSignificantAccountingPoliciesTable", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "fbss_NumberOfBankingOffices": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of banking offices.", "label": "Number Of Banking Offices", "terseLabel": "Number of banking offices" } } }, "localname": "NumberOfBankingOffices", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_NumberOfCommercialLoansManagedWithSwapAgreements": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of commercial loans for which interest rate risk is managed by interest rate swap agreements.", "label": "Number Of Commercial Loans Managed With Swap Agreements", "terseLabel": "Number of commercial loans managed with swap agreements" } } }, "localname": "NumberOfCommercialLoansManagedWithSwapAgreements", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_NumberOfDaysPastDueAfterLoanIsConsideredAccrual": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of days past due after loan is considered accrual.", "label": "Number Of Days Past Due After Loan Is Considered Accrual", "terseLabel": "Number of days past due after loan is considered accrual" } } }, "localname": "NumberOfDaysPastDueAfterLoanIsConsideredAccrual", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "fbss_NumberOfDaysPastDueBeforeLoanIsConsideredNonaccrual": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of days past due before loan is considered nonaccrual.", "label": "Number Of Days Past Due Before Loan Is Considered Nonaccrual", "terseLabel": "Number of days past due before a loan is considered nonaccrual" } } }, "localname": "NumberOfDaysPastDueBeforeLoanIsConsideredNonaccrual", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "fbss_NumberOfForeclosedPropertiesInPossessionOrInProcessOfForeclosure": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of foreclosed properties in possession or in the process of foreclosure.", "label": "Number Of Foreclosed Properties In Possession Or In Process Of Foreclosure", "terseLabel": "Number of foreclosed properties in possession or in process of foreclosure" } } }, "localname": "NumberOfForeclosedPropertiesInPossessionOrInProcessOfForeclosure", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_NumberOfLoansNotConsideredTDRsUnderCurrentGuidance": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Number of loans not considered TDRs under current guidance.", "label": "Number Of Loans Not Considered T D Rs Under Current Guidance", "terseLabel": "Number of loans not considered TDRs under current guidance" } } }, "localname": "NumberOfLoansNotConsideredTDRsUnderCurrentGuidance", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_NumberOfTDRLoansOutstanding": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The number of troubled debt restructuring loans outstanding in the portfolio.", "label": "Number Of T D R Loans Outstanding", "terseLabel": "Number of TDR loans in loan portfolio" } } }, "localname": "NumberOfTDRLoansOutstanding", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_NumberOfTdrLoansCurrentAndPerforming": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Represents the number of troubled debt restructuring loans that are current and performing in accordance with modified terms.", "label": "Number Of Tdr Loans Current And Performing", "terseLabel": "Number of TDR loans current and performing" } } }, "localname": "NumberOfTdrLoansCurrentAndPerforming", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_OffBalanceSheetRiskAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Off balance sheet risk abstract.", "label": "Off Balance Sheet Risk [Abstract]" } } }, "localname": "OffBalanceSheetRiskAbstract", "nsuri": "http://www.tfb.bank/20201231", "xbrltype": "stringItemType" }, "fbss_OtherCommitmentsNumberOfDataProcessingContractualObligations": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Other commitments number of data processing contractual obligations.", "label": "Other Commitments Number Of Data Processing Contractual Obligations", "terseLabel": "Number of data processing contractual obligations" } } }, "localname": "OtherCommitmentsNumberOfDataProcessingContractualObligations", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "fbss_OtherRealEstateOwnedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Other real estate owned by the company.", "label": "Other Real Estate Owned [Member]", "terseLabel": "Other Real Estate Owned [Member]" } } }, "localname": "OtherRealEstateOwnedMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "domainItemType" }, "fbss_OtherRealEstateOwnedNetFairValueDisclosure": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of other real estate owned, net of valuation allowance.", "label": "Other Real Estate Owned Net Fair Value Disclosure", "terseLabel": "Other real estate owned, net" } } }, "localname": "OtherRealEstateOwnedNetFairValueDisclosure", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "fbss_PercentageOfTaxBenefit": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percentage of tax benefit.", "label": "Percentage Of Tax Benefit", "terseLabel": "Percentage of tax benefit" } } }, "localname": "PercentageOfTaxBenefit", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "fbss_PerformanceBasedRestrictedStockUnitsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Performance based restricted stock units.", "label": "Performance Based Restricted Stock Units [Member]", "terseLabel": "Performance-Based Restricted Stock Units [Member]" } } }, "localname": "PerformanceBasedRestrictedStockUnitsMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_PeriodToConvertFixedRateAssetsToFloatingRateAssetsUnderAgreement": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Period to convert fixed rate assets to floating rate assets under agreement.", "label": "Period To Convert Fixed Rate Assets To Floating Rate Assets Under Agreement", "terseLabel": "Period to convert fixed rate assets to floating rate assets under agreement" } } }, "localname": "PeriodToConvertFixedRateAssetsToFloatingRateAssetsUnderAgreement", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "gYearItemType" }, "fbss_PeriodToConvertFloatingRateLiabilityToFixedRateLiabilityUnderAgreement": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Period to convert floating rate liability to fixed rate liability under agreement.", "label": "Period To Convert Floating Rate Liability To Fixed Rate Liability Under Agreement", "terseLabel": "Period to convert floating rate liability to fixed rate liability under agreement" } } }, "localname": "PeriodToConvertFloatingRateLiabilityToFixedRateLiabilityUnderAgreement", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "gYearItemType" }, "fbss_PrepaymentPenaltyOnEarlyDebtExtinguishment": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10140.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Prepayment penalty on early debt extinguishment.", "label": "Prepayment Penalty On Early Debt Extinguishment", "terseLabel": "Prepayment penalty on early debt extinguishment" } } }, "localname": "PrepaymentPenaltyOnEarlyDebtExtinguishment", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "fbss_ProceedsFromRepaymentsOfFederalHomeLoanBankAdvances": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10060.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Proceeds from repayments of federal home loan bank advances.", "label": "Proceeds From Repayments Of Federal Home Loan Bank Advances", "terseLabel": "Increase (decrease) in Federal Home Loan Bank advances" } } }, "localname": "ProceedsFromRepaymentsOfFederalHomeLoanBankAdvances", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "fbss_PurchaseRedemptionOfRestrictedInvestmentsNet": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10130.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "(Purchase) redemption of restricted investments, net.", "label": "Purchase Redemption Of Restricted Investments Net", "negatedLabel": "(Purchase) redemption of restricted investments, net" } } }, "localname": "PurchaseRedemptionOfRestrictedInvestmentsNet", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "fbss_RecentAccountingPronouncementsAndOtherRegulatoryStatementsPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Recent accounting pronouncements and other regulatory statements policy.", "label": "Recent Accounting Pronouncements And Other Regulatory Statements Policy Policy [Text Block]", "terseLabel": "Recent Accounting Pronouncements and Other Regulatory Statements" } } }, "localname": "RecentAccountingPronouncementsAndOtherRegulatoryStatementsPolicyPolicyTextBlock", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "fbss_ReclassificationOfIncomeTaxEffectOfTaxCutsAndJobsActFromAccumulatedOtherComprehensiveIncomeLoss": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Reclassification of income tax effect of tax cuts and jobs act from accumulated other comprehensive income (loss).", "label": "Reclassification Of Income Tax Effect Of Tax Cuts And Jobs Act From Accumulated Other Comprehensive Income Loss", "terseLabel": "Reclassification of the income tax effect of the Tax Cuts and Jobs Act from accumulated other comprehensive income (loss)" } } }, "localname": "ReclassificationOfIncomeTaxEffectOfTaxCutsAndJobsActFromAccumulatedOtherComprehensiveIncomeLoss", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "fbss_RepurchaseOfCommonStockUnvestedShares": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Repurchase of common stock unvested shares.", "label": "Repurchase Of Common Stock Unvested Shares", "terseLabel": "Repurchase of common stock - unvested shares (in Shares)" } } }, "localname": "RepurchaseOfCommonStockUnvestedShares", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical" ], "xbrltype": "sharesItemType" }, "fbss_RepurchaseOfCommonStockUnvestedValue": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Repurchase of common stock unvested value.", "label": "Repurchase Of Common Stock Unvested Value", "negatedLabel": "Repurchase of common stock - unvested shares" } } }, "localname": "RepurchaseOfCommonStockUnvestedValue", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "fbss_RestrictedInstrumentsPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Restricted instruments.", "label": "Restricted Instruments Policy [Text Block]", "terseLabel": "Restricted Instruments" } } }, "localname": "RestrictedInstrumentsPolicyTextBlock", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "fbss_ScheduleOfAmountsRecognizedInNetPeriodicBenefitCostsAndOtherComprehensiveIncomeLossTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the total amounts recognized in net periodic benefit costs and other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans.", "label": "Schedule Of Amounts Recognized In Net Periodic Benefit Costs And Other Comprehensive Income Loss Table [Text Block]", "terseLabel": "Total Recognized in Net Periodic Benefit Costs and Other Comprehensive Income Before Income Tax" } } }, "localname": "ScheduleOfAmountsRecognizedInNetPeriodicBenefitCostsAndOtherComprehensiveIncomeLossTableTextBlock", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "fbss_SmallBusinessAdministrationCARESActPaycheckProtectionProgramMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Small Business Administration CARES Act, Paycheck Protection Program.", "label": "Small Business Administration C A R E S Act Paycheck Protection Program [Member]", "terseLabel": "Small Business Administration (SBA) CARES Act, Paycheck Protection Program [Member]" } } }, "localname": "SmallBusinessAdministrationCARESActPaycheckProtectionProgramMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_StockIncentivePlanMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Under the Company's Stock Incentive Plan (Plan), stock options, stock appreciation rights, non-vested and/or restricted shares, and long-term performance unit awards may be granted to directors and certain employees for purchase of the Company's common stock.", "label": "Stock Incentive Plan [Member]", "terseLabel": "Stock Incentive Plan [Member]" } } }, "localname": "StockIncentivePlanMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "domainItemType" }, "fbss_StudentUsGovernmentGuaranteedMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Portfolio segment of the company's total financing receivables related to US Government guaranteed student receivables.", "label": "Student Us Government Guaranteed [Member]", "terseLabel": "Student [Member]" } } }, "localname": "StudentUsGovernmentGuaranteedMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "domainItemType" }, "fbss_TerminationFee": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Termination Fee.", "label": "Termination Fee", "terseLabel": "Termination fee" } } }, "localname": "TerminationFee", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "fbss_VirginiaNationalBanksharesCorporationMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Virginia national bankshares corporation.", "label": "Virginia National Bankshares Corporation [Member]", "terseLabel": "Virginia National Bankshares Corporation [Member]" } } }, "localname": "VirginiaNationalBanksharesCorporationMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "fbss_WealthManagementServicesPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for the Wealth Management Services division.", "label": "Wealth Management Services Policy [Text Block]", "terseLabel": "Wealth Management Services Division" } } }, "localname": "WealthManagementServicesPolicyTextBlock", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "fbss_WhollyOwnedConnecticutStatutoryBusinessTrustMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The Company's wholly-owned Connecticut statutory business trust.", "label": "Wholly Owned Connecticut Statutory Business Trust [Member]", "terseLabel": "Wholly-Owned Connecticut Statutory Business Trust [Member]" } } }, "localname": "WhollyOwnedConnecticutStatutoryBusinessTrustMember", "nsuri": "http://www.tfb.bank/20201231", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_CondensedBalanceSheetStatementTable": { "auth_ref": [ "r101", "r470", "r754" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about condensed balance sheet, including, but not limited to, balance sheets of consolidated entities and consolidation eliminations.", "label": "Condensed Balance Sheet Statement [Table]", "terseLabel": "Condensed Balance Sheet Statement [Table]" } } }, "localname": "CondensedBalanceSheetStatementTable", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails" ], "xbrltype": "stringItemType" }, "srt_CondensedBalanceSheetStatementsCaptionsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Condensed Balance Sheet Statements Captions [Line Items]", "terseLabel": "Condensed Balance Sheet Statements Captions [Line Items]" } } }, "localname": "CondensedBalanceSheetStatementsCaptionsLineItems", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails" ], "xbrltype": "stringItemType" }, "srt_CondensedCashFlowStatementTable": { "auth_ref": [ "r101", "r470", "r755" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about condensed cash flow statement, including, but not limited to, cash flow statements of consolidated entities and consolidation eliminations.", "label": "Condensed Cash Flow Statement [Table]", "terseLabel": "Condensed Cash Flow Statement [Table]" } } }, "localname": "CondensedCashFlowStatementTable", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails" ], "xbrltype": "stringItemType" }, "srt_CondensedCashFlowStatementsCaptionsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Condensed Cash Flow Statements Captions [Line Items]", "terseLabel": "Condensed Cash Flow Statements Captions [Line Items]" } } }, "localname": "CondensedCashFlowStatementsCaptionsLineItems", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails" ], "xbrltype": "stringItemType" }, "srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Condensed Financial Information Of Parent Company Only Disclosure [Abstract]" } } }, "localname": "CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract", "nsuri": "http://fasb.org/srt/2020-01-31", "xbrltype": "stringItemType" }, "srt_CondensedIncomeStatementTable": { "auth_ref": [ "r101", "r470", "r755" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about condensed income statement including, but not limited to, income statements of consolidated entities and consolidation eliminations.", "label": "Condensed Income Statement [Table]", "terseLabel": "Condensed Income Statement [Table]" } } }, "localname": "CondensedIncomeStatementTable", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails" ], "xbrltype": "stringItemType" }, "srt_CondensedIncomeStatementsCaptionsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Condensed Income Statements Captions [Line Items]", "terseLabel": "Condensed Income Statements Captions [Line Items]" } } }, "localname": "CondensedIncomeStatementsCaptionsLineItems", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails" ], "xbrltype": "stringItemType" }, "srt_ConsolidatedEntitiesAxis": { "auth_ref": [ "r473", "r474", "r479", "r480", "r744", "r753" ], "lang": { "en-us": { "role": { "documentation": "Information by consolidated entity or group of entities.", "label": "Consolidated Entities [Axis]", "terseLabel": "Consolidated Entities" } } }, "localname": "ConsolidatedEntitiesAxis", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails" ], "xbrltype": "stringItemType" }, "srt_ConsolidatedEntitiesDomain": { "auth_ref": [ "r473", "r474", "r479", "r480" ], "lang": { "en-us": { "role": { "documentation": "Entity or group of entities consolidated into reporting entity.", "label": "Consolidated Entities [Domain]", "terseLabel": "Consolidated Entities" } } }, "localname": "ConsolidatedEntitiesDomain", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails" ], "xbrltype": "domainItemType" }, "srt_DirectorMember": { "auth_ref": [ "r158" ], "lang": { "en-us": { "role": { "documentation": "Person serving on board of directors.", "label": "Director [Member]", "terseLabel": "Nonemployee Director [Member]" } } }, "localname": "DirectorMember", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_ExecutiveOfficerMember": { "auth_ref": [ "r158" ], "lang": { "en-us": { "role": { "documentation": "Person with designation of executive officer.", "label": "Executive Officer [Member]", "terseLabel": "Certain Executive Officers [Member]" } } }, "localname": "ExecutiveOfficerMember", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_ManagementMember": { "auth_ref": [ "r158", "r565" ], "lang": { "en-us": { "role": { "documentation": "Person or persons designated as part of management.", "label": "Management [Member]", "terseLabel": "Executive [Member]" } } }, "localname": "ManagementMember", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_MaximumMember": { "auth_ref": [ "r397", "r402", "r576", "r577", "r578", "r581", "r582", "r583", "r603", "r701", "r703" ], "lang": { "en-us": { "role": { "documentation": "Upper limit of the provided range.", "label": "Maximum [Member]", "terseLabel": "Maximum [Member]" } } }, "localname": "MaximumMember", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_MinimumMember": { "auth_ref": [ "r397", "r402", "r576", "r577", "r578", "r581", "r582", "r583", "r603", "r701", "r703" ], "lang": { "en-us": { "role": { "documentation": "Lower limit of the provided range.", "label": "Minimum [Member]", "terseLabel": "Minimum [Member]" } } }, "localname": "MinimumMember", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_ParentCompanyMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The registrant that controls, directly or indirectly, another entity (or entities). The usual condition for control is ownership of a majority (over 50%) of the outstanding voting stock. The power to control may also exist with a lesser percentage of ownership, for example, by contract, lease, agreement with other stockholders or by court decree.", "label": "Parent Company [Member]", "terseLabel": "Fauquier Bankshares, Inc [Member]" } } }, "localname": "ParentCompanyMember", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails" ], "xbrltype": "domainItemType" }, "srt_ProductOrServiceAxis": { "auth_ref": [ "r155", "r305", "r306", "r604", "r700", "r702" ], "lang": { "en-us": { "role": { "documentation": "Information by product and service, or group of similar products and similar services.", "label": "Product Or Service [Axis]", "terseLabel": "Product and Service" } } }, "localname": "ProductOrServiceAxis", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "stringItemType" }, "srt_ProductsAndServicesDomain": { "auth_ref": [ "r155", "r305", "r306", "r604", "r700", "r702" ], "lang": { "en-us": { "role": { "documentation": "Product or service, or a group of similar products or similar services.", "label": "Products And Services [Domain]", "terseLabel": "Product and Service" } } }, "localname": "ProductsAndServicesDomain", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "domainItemType" }, "srt_RangeAxis": { "auth_ref": [ "r338", "r397", "r402", "r576", "r577", "r578", "r581", "r582", "r583", "r603", "r701", "r703" ], "lang": { "en-us": { "role": { "documentation": "Information by statistical measurement. Includes, but is not limited to, minimum, maximum, weighted average, arithmetic average, and median.", "label": "Range [Axis]", "terseLabel": "Statistical Measurement" } } }, "localname": "RangeAxis", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "srt_RangeMember": { "auth_ref": [ "r338", "r397", "r402", "r576", "r577", "r578", "r581", "r582", "r583", "r603", "r701", "r703" ], "lang": { "en-us": { "role": { "documentation": "Statistical measurement. Includes, but is not limited to, minimum, maximum, weighted average, arithmetic average, and median.", "label": "Range [Member]", "terseLabel": "Statistical Measurement" } } }, "localname": "RangeMember", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_RegulatoryCapitalRequirementsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Regulatory Capital Requirements [Abstract]" } } }, "localname": "RegulatoryCapitalRequirementsAbstract", "nsuri": "http://fasb.org/srt/2020-01-31", "xbrltype": "stringItemType" }, "srt_ScheduleOfCondensedBalanceSheetTableTextBlock": { "auth_ref": [ "r756" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of condensed balance sheet, including, but not limited to, balance sheets of consolidated entities and consolidation eliminations.", "label": "Schedule Of Condensed Balance Sheet Table [Text Block]", "terseLabel": "Schedule of Balance Sheets" } } }, "localname": "ScheduleOfCondensedBalanceSheetTableTextBlock", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsTables" ], "xbrltype": "textBlockItemType" }, "srt_ScheduleOfCondensedCashFlowStatementTableTextBlock": { "auth_ref": [ "r756" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of condensed cash flow statement, including, but not limited to, cash flow statements of consolidated entities and consolidation eliminations.", "label": "Schedule Of Condensed Cash Flow Statement Table [Text Block]", "terseLabel": "Schedule of Statements of Cash Flows" } } }, "localname": "ScheduleOfCondensedCashFlowStatementTableTextBlock", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsTables" ], "xbrltype": "textBlockItemType" }, "srt_ScheduleOfCondensedIncomeStatementTableTextBlock": { "auth_ref": [ "r756" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of condensed income statement, including, but not limited to, income statements of consolidated entities and consolidation eliminations.", "label": "Schedule Of Condensed Income Statement Table [Text Block]", "terseLabel": "Schedule of Statements of Operations" } } }, "localname": "ScheduleOfCondensedIncomeStatementTableTextBlock", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsTables" ], "xbrltype": "textBlockItemType" }, "srt_SubsidiariesMember": { "auth_ref": [ "r366", "r563", "r564", "r566" ], "lang": { "en-us": { "role": { "documentation": "Entity owned or controlled by another entity.", "label": "Subsidiaries [Member]", "terseLabel": "The Fauquier Bank [Member]" } } }, "localname": "SubsidiariesMember", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "domainItemType" }, "srt_TitleOfIndividualAxis": { "auth_ref": [ "r158", "r565" ], "lang": { "en-us": { "role": { "documentation": "Information by title of individual or nature of relationship to individual or group of individuals.", "label": "Title Of Individual [Axis]", "terseLabel": "Title of Individual" } } }, "localname": "TitleOfIndividualAxis", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "srt_TitleOfIndividualWithRelationshipToEntityDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Title of individual, or nature of relationship to individual or group of individuals.", "label": "Title Of Individual With Relationship To Entity [Domain]", "terseLabel": "Title of Individual" } } }, "localname": "TitleOfIndividualWithRelationshipToEntityDomain", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "srt_WeightedAverageMember": { "auth_ref": [ "r576", "r578", "r583" ], "lang": { "en-us": { "role": { "documentation": "Average of a range of values, calculated with consideration of proportional relevance.", "label": "Weighted Average [Member]", "terseLabel": "Weighted Average [Member]" } } }, "localname": "WeightedAverageMember", "nsuri": "http://fasb.org/srt/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccountingPoliciesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Accounting Policies [Abstract]" } } }, "localname": "AccountingPoliciesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_AccountingStandardsUpdate201813Member": { "auth_ref": [ "r525" ], "lang": { "en-us": { "role": { "documentation": "Accounting Standards Update 2018-13 Fair Value Measurement (Topic 820): Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement.", "label": "Accounting Standards Update201813 [Member]", "terseLabel": "ASU 2018-13 [Member]" } } }, "localname": "AccountingStandardsUpdate201813Member", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccountsNotesLoansAndFinancingReceivableGrossAllowanceAndNetAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Accounts Notes Loans And Financing Receivable Gross Allowance And Net [Abstract]" } } }, "localname": "AccountsNotesLoansAndFinancingReceivableGrossAllowanceAndNetAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments": { "auth_ref": [ "r88" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10220.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.", "label": "Accretion Amortization Of Discounts And Premiums Investments", "negatedLabel": "Amortization of security premiums, net" } } }, "localname": "AccretionAmortizationOfDiscountsAndPremiumsInvestments", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccruedLiabilitiesFairValueDisclosure": { "auth_ref": [ "r29" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10050.0, "parentTag": "us-gaap_FinancialLiabilitiesFairValueDisclosure", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of accrued expenses.", "label": "Accrued Liabilities Fair Value Disclosure", "terseLabel": "Accrued interest payable" } } }, "localname": "AccruedLiabilitiesFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember": { "auth_ref": [ "r42", "r48", "r51", "r478" ], "lang": { "en-us": { "role": { "documentation": "Accumulated other comprehensive (income) loss related to defined benefit plans attributable to the parent.", "label": "Accumulated Defined Benefit Plans Adjustment [Member]", "terseLabel": "Supplemental Executive Retirement Plans [Member]" } } }, "localname": "AccumulatedDefinedBenefitPlansAdjustmentMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment": { "auth_ref": [ "r23", "r276" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails": { "order": 10020.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.", "label": "Accumulated Depreciation Depletion And Amortization Property Plant And Equipment", "negatedLabel": "Accumulated depreciation" } } }, "localname": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember": { "auth_ref": [ "r48", "r59", "r477" ], "lang": { "en-us": { "role": { "documentation": "Accumulated other comprehensive income (loss) from gain (loss) of derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.", "label": "Accumulated Gain Loss Net Cash Flow Hedge Parent [Member]", "terseLabel": "Gains (Losses) on Cash Flow Hedges [Member]" } } }, "localname": "AccumulatedGainLossNetCashFlowHedgeParentMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember": { "auth_ref": [ "r38", "r39", "r40", "r48", "r51" ], "lang": { "en-us": { "role": { "documentation": "Accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), attributable to parent.", "label": "Accumulated Net Unrealized Investment Gain Loss [Member]", "terseLabel": "Unrealized Gains (Losses) on Available for Sale Securities [Member]" } } }, "localname": "AccumulatedNetUnrealizedInvestmentGainLossMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax": { "auth_ref": [ "r43", "r48", "r359" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).", "label": "Accumulated Other Comprehensive Income Loss Defined Benefit Pension And Other Postretirement Plans Net Of Tax", "terseLabel": "Accumulated other comprehensive income", "totalLabel": "Amount recognized" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Accumulated Other Comprehensive Income Loss [Line Items]", "terseLabel": "Changes in Accumulated Other Comprehensive Income [Roll Forward]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r16", "r45", "r47", "r48", "r686", "r711", "r715" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10050.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.", "label": "Accumulated Other Comprehensive Income Loss Net Of Tax", "terseLabel": "Accumulated other comprehensive income, net", "verboseLabel": "Accumulated other comprehensive income" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossTable": { "auth_ref": [ "r533", "r534", "r535", "r536", "r537", "r539" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about components of accumulated other comprehensive income (loss).", "label": "Accumulated Other Comprehensive Income Loss [Table]", "terseLabel": "Accumulated Other Comprehensive Income Loss [Table]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeMember": { "auth_ref": [ "r44", "r48", "r51", "r103", "r104", "r105", "r478", "r706", "r707" ], "lang": { "en-us": { "role": { "documentation": "Accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, attributable to the parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.", "label": "Accumulated Other Comprehensive Income [Member]", "terseLabel": "Accumulated Other Comprehensive Income (Loss) [Member]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AdjustmentsForNewAccountingPronouncementsAxis": { "auth_ref": [ "r107", "r108", "r109", "r110", "r232", "r233", "r234", "r235", "r237", "r238", "r419", "r420", "r421", "r422", "r423", "r424", "r425", "r426", "r447", "r448", "r449", "r450", "r605", "r606", "r607", "r704", "r705", "r706", "r707", "r708", "r709", "r710", "r711", "r712", "r713", "r714", "r715" ], "lang": { "en-us": { "role": { "documentation": "Information by amendment to accounting standards.", "label": "Adjustments For New Accounting Pronouncements [Axis]", "terseLabel": "Accounting Standards Update" } } }, "localname": "AdjustmentsForNewAccountingPronouncementsAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase to additional paid-in capital (APIC) for recognition of cost for restricted stock unit under share-based payment arrangement.", "label": "Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition", "terseLabel": "Amortization of unearned compensation, restricted stock awards" } } }, "localname": "AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]", "terseLabel": "Adjustments to reconcile net income to net cash provided by operating activities:" } } }, "localname": "AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_AdvancesFromFederalHomeLoanBanks": { "auth_ref": [ "r667" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsScheduleOfContractualMaturitiesOfFHLBAdvancesDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10070.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.", "label": "Advances From Federal Home Loan Banks", "terseLabel": "Federal Home Loan Bank advances", "totalLabel": "Total FHLB advances" } } }, "localname": "AdvancesFromFederalHomeLoanBanks", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsScheduleOfContractualMaturitiesOfFHLBAdvancesDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdvancesFromFederalHomeLoanBanksAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Advances From Federal Home Loan Banks [Abstract]", "terseLabel": "Federal Home Loan Bank Advances and Other Borrowings [Abstract]" } } }, "localname": "AdvancesFromFederalHomeLoanBanksAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_AdvertisingCostsPolicyTextBlock": { "auth_ref": [ "r429" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for advertising cost.", "label": "Advertising Costs Policy [Text Block]", "terseLabel": "Marketing" } } }, "localname": "AdvertisingCostsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_AffordableHousingProgramObligation": { "auth_ref": [], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of obligation related to Affordable Housing Program (AHP) assessments required by the Federal Home Loan Bank Act of 1932.", "label": "Affordable Housing Program Obligation", "terseLabel": "Capital call for investments in affordable housing projects" } } }, "localname": "AffordableHousingProgramObligation", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AffordableHousingProgramTextBlock": { "auth_ref": [ "r680" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for Affordable Housing Program (AHP).", "label": "Affordable Housing Program [Text Block]", "terseLabel": "Investment in Affordable Housing Projects" } } }, "localname": "AffordableHousingProgramTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjects" ], "xbrltype": "textBlockItemType" }, "us-gaap_AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount": { "auth_ref": [ "r226" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of affordable housing tax credits and other tax benefits recognized.", "label": "Affordable Housing Tax Credits And Other Tax Benefits Amount", "terseLabel": "Tax credits and other benefits recognized" } } }, "localname": "AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AffordableHousingTaxCreditsCommitmentYearToBePaid": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Year in which contingent commitments to qualified affordable housing project investments are expected to be paid, in CCYY format.", "label": "Affordable Housing Tax Credits Commitment Year To Be Paid", "terseLabel": "Year in which investments are expected to be paid" } } }, "localname": "AffordableHousingTaxCreditsCommitmentYearToBePaid", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails" ], "xbrltype": "gYearListItemType" }, "us-gaap_AllocatedShareBasedCompensationExpense": { "auth_ref": [ "r405", "r416", "r427" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.", "label": "Allocated Share Based Compensation Expense", "verboseLabel": "Compensation expense" } } }, "localname": "AllocatedShareBasedCompensationExpense", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock": { "auth_ref": [ "r167", "r245" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of allowance for credit loss on financing receivable.", "label": "Allowance For Credit Losses On Financing Receivables Table [Text Block]", "terseLabel": "Schedule of Allowance for Loan Losses by Portfolio Segment" } } }, "localname": "AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs": { "auth_ref": [ "r244" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails": { "order": 10040.0, "parentTag": "us-gaap_OtherNoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of direct write-downs of accounts receivable charged against the allowance.", "label": "Allowance For Doubtful Accounts Receivable Write Offs", "terseLabel": "Charge-offs, other than loan charge-offs" } } }, "localname": "AllowanceForDoubtfulAccountsReceivableWriteOffs", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts": { "auth_ref": [ "r164" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.", "label": "Allowance For Loan And Lease Loss Recovery Of Bad Debts", "terseLabel": "Recoveries" } } }, "localname": "AllowanceForLoanAndLeaseLossRecoveryOfBadDebts", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AllowanceForLoanAndLeaseLossesRollForward": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.", "label": "Allowance For Loan And Lease Losses Roll Forward", "terseLabel": "Allowance for Loan Losses [Roll Forward]" } } }, "localname": "AllowanceForLoanAndLeaseLossesRollForward", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs": { "auth_ref": [ "r163" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.", "label": "Allowance For Loan And Lease Losses Write Offs", "negatedLabel": "Charge-offs" } } }, "localname": "AllowanceForLoanAndLeaseLossesWriteOffs", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AlternativeInvestmentMeasurementInput": { "auth_ref": [ "r517" ], "lang": { "en-us": { "role": { "documentation": "Value of input used to measure alternative investment.", "label": "Alternative Investment Measurement Input", "terseLabel": "Weighted Average Discount" } } }, "localname": "AlternativeInvestmentMeasurementInput", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "decimalItemType" }, "us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestments": { "auth_ref": [ "r227" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment in qualified affordable housing projects.", "label": "Amortization Method Qualified Affordable Housing Project Investments", "terseLabel": "Investments in affordable housing projects" } } }, "localname": "AmortizationMethodQualifiedAffordableHousingProjectInvestments", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax": { "auth_ref": [ "r386" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount recognized in net periodic benefit cost (credit) and other comprehensive (income) loss.", "label": "Amount Recognized In Net Periodic Benefit Cost And Other Comprehensive Income Loss Before Tax", "terseLabel": "Total recognized in net periodic benefit costs and other comprehensive income before income tax" } } }, "localname": "AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ArrangementsAndNonarrangementTransactionsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations.", "label": "Arrangements And Nonarrangement Transactions [Member]", "terseLabel": "Collaborative Arrangement and Arrangement Other than Collaborative" } } }, "localname": "ArrangementsAndNonarrangementTransactionsMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_Assets": { "auth_ref": [ "r93", "r144", "r147", "r153", "r225", "r473", "r479", "r530", "r614", "r684" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.", "label": "Assets", "totalLabel": "Total assets" } } }, "localname": "Assets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Assets [Abstract]", "terseLabel": "Assets", "verboseLabel": "Assets" } } }, "localname": "AssetsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_AssetsFairValueAdjustment": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties.", "label": "Assets Fair Value Adjustment", "terseLabel": "Nonrecurring fair value adjustments" } } }, "localname": "AssetsFairValueAdjustment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsFairValueDisclosure": { "auth_ref": [ "r512" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.", "label": "Assets Fair Value Disclosure", "totalLabel": "Total assets at fair value", "verboseLabel": "Fair Value" } } }, "localname": "AssetsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsFairValueDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Assets Fair Value Disclosure [Abstract]", "terseLabel": "Assets [Abstract]" } } }, "localname": "AssetsFairValueDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax": { "auth_ref": [ "r200" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails": { "order": 10010.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax", "terseLabel": "Gross unrealized gains" } } }, "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax": { "auth_ref": [ "r201" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails": { "order": 10020.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax", "negatedLabel": "Gross unrealized (losses)" } } }, "localname": "AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis": { "auth_ref": [ "r198", "r262" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Available For Sale Debt Securities Amortized Cost Basis", "totalLabel": "Amortized cost" } } }, "localname": "AvailableForSaleDebtSecuritiesAmortizedCostBasis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Available For Sale Securities [Abstract]", "terseLabel": "Securities Available for Sale [Abstract]" } } }, "localname": "AvailableForSaleSecuritiesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost": { "auth_ref": [ "r206" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails": { "order": 10070.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost", "terseLabel": "Due after five years through ten years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue": { "auth_ref": [ "r202", "r206", "r661" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails": { "order": 10030.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value", "terseLabel": "Due after five years through ten years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost": { "auth_ref": [ "r205" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails": { "order": 10060.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost", "terseLabel": "Due after one year through five years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue": { "auth_ref": [ "r202", "r205", "r660" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails": { "order": 10020.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Available For Sale Securities Debt Maturities After One Through Five Years Fair Value", "terseLabel": "Due after one year through five years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost": { "auth_ref": [ "r207" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails": { "order": 10080.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Available For Sale Securities Debt Maturities After Ten Years Amortized Cost", "terseLabel": "Due after ten years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue": { "auth_ref": [ "r202", "r207", "r662" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails": { "order": 10040.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Available For Sale Securities Debt Maturities After Ten Years Fair Value", "terseLabel": "Due after ten years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Available For Sale Securities Debt Maturities Amortized Cost [Abstract]", "terseLabel": "Amortized Cost [Abstract]" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Available For Sale Securities Debt Maturities Fair Value [Abstract]", "terseLabel": "Fair Value [Abstract]" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesFairValueAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost": { "auth_ref": [ "r204" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails": { "order": 10050.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Available For Sale Securities Debt Maturities Within One Year Amortized Cost", "terseLabel": "Due in one year or less" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue": { "auth_ref": [ "r202", "r204", "r659" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails": { "order": 10010.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Available For Sale Securities Debt Maturities Within One Year Fair Value", "terseLabel": "Due in one year or less" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtSecurities": { "auth_ref": [ "r195", "r199", "r262", "r619" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10060.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails": { "order": 10030.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10180.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Available For Sale Securities Debt Securities", "positiveLabel": "Available for sale securities", "positiveTerseLabel": "Securities available for sale", "terseLabel": "Securities available for sale, at fair value", "totalLabel": "Total fair value", "verboseLabel": "Fair value" } } }, "localname": "AvailableForSaleSecuritiesDebtSecurities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleByContractualMaturityDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AwardTypeAxis": { "auth_ref": [ "r406", "r418" ], "lang": { "en-us": { "role": { "documentation": "Information by type of award under share-based payment arrangement.", "label": "Award Type [Axis]", "terseLabel": "Award Type" } } }, "localname": "AwardTypeAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BalanceSheetLocationAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by location on balance sheet (statement of financial position).", "label": "Balance Sheet Location [Axis]", "terseLabel": "Balance Sheet Location" } } }, "localname": "BalanceSheetLocationAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BalanceSheetLocationDomain": { "auth_ref": [ "r492", "r496" ], "lang": { "en-us": { "role": { "documentation": "Location in the balance sheet (statement of financial position).", "label": "Balance Sheet Location [Domain]", "terseLabel": "Balance Sheet Location" } } }, "localname": "BalanceSheetLocationDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_BankOwnedLifeInsurance": { "auth_ref": [ "r613" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10250.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy.", "label": "Bank Owned Life Insurance", "terseLabel": "Bank-owned life insurance" } } }, "localname": "BankOwnedLifeInsurance", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_BankOwnedLifeInsuranceIncome": { "auth_ref": [ "r646" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10250.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10200.0, "parentTag": "us-gaap_NoninterestIncome", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies.", "label": "Bank Owned Life Insurance Income", "negatedLabel": "Bank-owned life insurance income", "terseLabel": "Bank-owned life insurance" } } }, "localname": "BankOwnedLifeInsuranceIncome", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_BasisOfAccountingPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).", "label": "Basis Of Accounting Policy Policy [Text Block]", "terseLabel": "Principles of Consolidation" } } }, "localname": "BasisOfAccountingPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock": { "auth_ref": [ "r102" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for the basis of presentation and significant accounting policies concepts. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Accounting policies describe all significant accounting policies of the reporting entity.", "label": "Basis Of Presentation And Significant Accounting Policies [Text Block]", "terseLabel": "Basis of Presentation" } } }, "localname": "BasisOfPresentationAndSignificantAccountingPoliciesTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_BrokerageCommissionsRevenue": { "auth_ref": [ "r608", "r644" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10170.0, "parentTag": "us-gaap_NoninterestIncome", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of commission revenue from buying and selling securities on behalf of customers.", "label": "Brokerage Commissions Revenue", "terseLabel": "Brokerage fees" } } }, "localname": "BrokerageCommissionsRevenue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_BuildingAndBuildingImprovementsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Facility held for productive use including, but not limited to, office, production, storage and distribution facilities and any addition, improvement, or renovation to the structure, for example, but not limited to, interior masonry, interior flooring, electrical, and plumbing.", "label": "Building And Building Improvements [Member]", "terseLabel": "Buildings and Improvements [Member]" } } }, "localname": "BuildingAndBuildingImprovementsMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_BusinessAcquisitionAcquireeDomain": { "auth_ref": [ "r393", "r398" ], "lang": { "en-us": { "role": { "documentation": "Identification of the acquiree in a material business combination (or series of individually immaterial business combinations), which may include the name or other type of identification of the acquiree.", "label": "Business Acquisition Acquiree [Domain]", "terseLabel": "Business Acquisition, Acquiree" } } }, "localname": "BusinessAcquisitionAcquireeDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_BusinessAcquisitionAxis": { "auth_ref": [ "r393", "r398", "r466", "r467" ], "lang": { "en-us": { "role": { "documentation": "Information by business combination or series of individually immaterial business combinations.", "label": "Business Acquisition [Axis]", "terseLabel": "Business Acquisition" } } }, "localname": "BusinessAcquisitionAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued": { "auth_ref": [ "r468" ], "lang": { "en-us": { "role": { "documentation": "Number of shares of equity interests issued or issuable to acquire entity.", "label": "Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued", "terseLabel": "Common stock holders right to receive shares for each share" } } }, "localname": "BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_BusinessCombinationAcquisitionRelatedCosts": { "auth_ref": [ "r465" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10130.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.", "label": "Business Combination Acquisition Related Costs", "terseLabel": "Merger related expenses" } } }, "localname": "BusinessCombinationAcquisitionRelatedCosts", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationsPolicy": { "auth_ref": [ "r91", "r464" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for completed business combinations (purchase method, acquisition method or combination of entities under common control). This accounting policy may include a general discussion of the purchase method or acquisition method of accounting (including for example, the treatment accorded contingent consideration, the identification of assets and liabilities, the purchase price allocation process, how the fair values of acquired assets and liabilities are determined) and the entity's specific application thereof. An entity that acquires another entity in a leveraged buyout transaction generally discloses the accounting policy followed by the acquiring entity in determining the basis used to value its interest in the acquired entity, and the rationale for that accounting policy.", "label": "Business Combinations Policy", "terseLabel": "Business Combination" } } }, "localname": "BusinessCombinationsPolicy", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_Capital": { "auth_ref": [ "r673", "r737", "r738" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of total capital as defined by regulatory framework.", "label": "Capital", "terseLabel": "Actual amount" } } }, "localname": "Capital", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Capital [Abstract]", "terseLabel": "Total Capital (to Risk-Weighted Assets) [Abstract]" } } }, "localname": "CapitalAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CapitalRequiredForCapitalAdequacy": { "auth_ref": [ "r673", "r677" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of minimum total risk-based capital required for capital adequacy as defined by regulatory framework.", "label": "Capital Required For Capital Adequacy", "terseLabel": "Minimum capital requirement amount" } } }, "localname": "CapitalRequiredForCapitalAdequacy", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets": { "auth_ref": [ "r673", "r677" ], "lang": { "en-us": { "role": { "documentation": "Ratio of minimum total risk-based capital to risk-weighted assets required for capital adequacy as defined by regulatory framework.", "label": "Capital Required For Capital Adequacy To Risk Weighted Assets", "terseLabel": "Minimum capital requirement ratio" } } }, "localname": "CapitalRequiredForCapitalAdequacyToRiskWeightedAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "pureItemType" }, "us-gaap_CapitalRequiredToBeWellCapitalized": { "auth_ref": [ "r673" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of minimum total risk-based capital categorized as well capitalized as defined by regulatory framework for prompt corrective action.", "label": "Capital Required To Be Well Capitalized", "terseLabel": "Well capitalized under prompt corrective action provisions amount" } } }, "localname": "CapitalRequiredToBeWellCapitalized", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets": { "auth_ref": [ "r673" ], "lang": { "en-us": { "role": { "documentation": "Ratio of minimum total risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.", "label": "Capital Required To Be Well Capitalized To Risk Weighted Assets", "terseLabel": "Well capitalized under prompt corrective action provisions ratio" } } }, "localname": "CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "pureItemType" }, "us-gaap_CapitalToRiskWeightedAssets": { "auth_ref": [ "r673" ], "lang": { "en-us": { "role": { "documentation": "Ratio of total risk-based capital to risk-weighted assets as defined by regulatory framework.", "label": "Capital To Risk Weighted Assets", "verboseLabel": "Actual ratio" } } }, "localname": "CapitalToRiskWeightedAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "pureItemType" }, "us-gaap_CarryingReportedAmountFairValueDisclosureMember": { "auth_ref": [ "r528", "r529" ], "lang": { "en-us": { "role": { "documentation": "Measured as reported on the statement of financial position (balance sheet).", "label": "Carrying Reported Amount Fair Value Disclosure [Member]", "terseLabel": "Carrying Amount [Member]" } } }, "localname": "CarryingReportedAmountFairValueDisclosureMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cash And Cash Equivalents At Carrying Value [Abstract]", "terseLabel": "Cash and Cash Equivalents" } } }, "localname": "CashAndCashEquivalentsAtCarryingValueAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_CashAndCashEquivalentsFairValueDisclosure": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10080.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Cash And Cash Equivalents Fair Value Disclosure", "terseLabel": "Cash and short-term investments" } } }, "localname": "CashAndCashEquivalentsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsPolicyTextBlock": { "auth_ref": [ "r5", "r89", "r91" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.", "label": "Cash And Cash Equivalents Policy [Text Block]", "terseLabel": "Cash and Cash Equivalents" } } }, "localname": "CashAndCashEquivalentsPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CashAndDueFromBanks": { "auth_ref": [ "r612" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails": { "order": 10010.0, "parentTag": "us-gaap_Assets", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10150.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks.", "label": "Cash And Due From Banks", "terseLabel": "Cash and due from banks", "verboseLabel": "Cash" } } }, "localname": "CashAndDueFromBanks", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndSecuritiesSegregatedUnderFederalAndOtherRegulationsDisclosuresAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Cash And Securities Segregated Under Federal And Other Regulations Disclosures [Abstract]", "terseLabel": "Cash Segregated under Federal Regulations [Abstract]" } } }, "localname": "CashAndSecuritiesSegregatedUnderFederalAndOtherRegulationsDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CashCashEquivalentsAndFederalFundsSold": { "auth_ref": [ "r621" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The sum of cash and cash equivalents plus Federal Funds Sold. Cash and cash equivalents consist of short term, highly liquid investments that are readily convertible to known amounts of cash and are so near their maturity that they present negligible risk of changes in value due to changes in interest rates -- usually with an original maturity less than 90 days.", "label": "Cash Cash Equivalents And Federal Funds Sold", "periodEndLabel": "Ending", "periodStartLabel": "Beginning" } } }, "localname": "CashCashEquivalentsAndFederalFundsSold", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect": { "auth_ref": [ "r81", "r532" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect", "totalLabel": "Increase (decrease) in cash and cash equivalents" } } }, "localname": "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashFlowHedgingMember": { "auth_ref": [ "r489" ], "lang": { "en-us": { "role": { "documentation": "Hedge of the exposure to variability in the cash flows of a recognized asset or liability, or of a forecasted transaction, that is attributable to a particular risk.", "label": "Cash Flow Hedging [Member]", "terseLabel": "Cash Flow Hedging [Member]" } } }, "localname": "CashFlowHedgingMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CashReserveDepositRequiredAndMade": { "auth_ref": [ "r611" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations.", "label": "Cash Reserve Deposit Required And Made", "terseLabel": "Daily average required cash balances with the Federal Reserve Bank" } } }, "localname": "CashReserveDepositRequiredAndMade", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashSurrenderValueFairValueDisclosure": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10130.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of the amount that could be realized under a life insurance contract or contracts owned by the entity, commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).", "label": "Cash Surrender Value Fair Value Disclosure", "terseLabel": "Bank-owned life insurance" } } }, "localname": "CashSurrenderValueFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashSurrenderValueOfLifeInsurance": { "auth_ref": [ "r4", "r24" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.", "label": "Cash Surrender Value Of Life Insurance", "terseLabel": "Cash surrender value of life insurance policies" } } }, "localname": "CashSurrenderValueOfLifeInsurance", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted": { "auth_ref": [ "r106", "r229", "r230", "r231", "r232", "r233", "r419", "r420", "r421", "r447", "r508", "r531", "r546", "r605", "r606", "r704", "r705" ], "lang": { "en-us": { "role": { "documentation": "Indicates (true false) whether accounting standards update was adopted.", "label": "Change In Accounting Principle Accounting Standards Update Adopted", "terseLabel": "Change in Accounting Principle, Accounting Standards Update, Adopted" } } }, "localname": "ChangeInAccountingPrincipleAccountingStandardsUpdateAdopted", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "booleanItemType" }, "us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate": { "auth_ref": [ "r113", "r229", "r230", "r231", "r232", "r233", "r419", "r420", "r421", "r447", "r508", "r531", "r546", "r605", "r606", "r704", "r705" ], "lang": { "en-us": { "role": { "documentation": "Date accounting standards update was adopted, in CCYY-MM-DD format.", "label": "Change In Accounting Principle Accounting Standards Update Adoption Date", "terseLabel": "Change in Accounting Principle, Accounting Standards Update, Adoption Date" } } }, "localname": "ChangeInAccountingPrincipleAccountingStandardsUpdateAdoptionDate", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "dateItemType" }, "us-gaap_ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect": { "auth_ref": [ "r107", "r119", "r236", "r426", "r451" ], "lang": { "en-us": { "role": { "documentation": "Indicates (true false) whether effect from applying amendment to accounting standards is immaterial.", "label": "Change In Accounting Principle Accounting Standards Update Immaterial Effect", "terseLabel": "Change in Accounting Principle, Accounting Standards Update, Immaterial Effect" } } }, "localname": "ChangeInAccountingPrincipleAccountingStandardsUpdateImmaterialEffect", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "booleanItemType" }, "us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock": { "auth_ref": [ "r327" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the change in the benefit obligation, fair value of plan assets, and funded status of pension plans or other employee benefit plans.", "label": "Changes In Projected Benefit Obligations Fair Value Of Plan Assets And Funded Status Of Plan Table [Text Block]", "terseLabel": "Change in Benefit Obligations" } } }, "localname": "ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_CommercialPortfolioSegmentMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Portfolio segment of the company's total financing receivables related to commercial receivables.", "label": "Commercial Portfolio Segment [Member]", "terseLabel": "Commercial and Industrial [Member]" } } }, "localname": "CommercialPortfolioSegmentMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesSummaryOfModificationClassifiedTroubledDebtRestructuringDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CommercialRealEstatePortfolioSegmentMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Portfolio segment of the company's total financing receivables related to commercial real estate.", "label": "Commercial Real Estate Portfolio Segment [Member]", "terseLabel": "Commercial Real Estate [Member]" } } }, "localname": "CommercialRealEstatePortfolioSegmentMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Commitments And Contingencies Disclosure [Abstract]" } } }, "localname": "CommitmentsAndContingenciesDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": { "auth_ref": [ "r279", "r280", "r281", "r282" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for commitments and contingencies.", "label": "Commitments And Contingencies Disclosure [Text Block]", "terseLabel": "Commitments and Contingent Liabilities" } } }, "localname": "CommitmentsAndContingenciesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilities" ], "xbrltype": "textBlockItemType" }, "us-gaap_CommitmentsToExtendCreditMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Loan commitments are legally binding commitments to extend credit to a counterparty under certain terms and conditions.", "label": "Commitments To Extend Credit [Member]", "terseLabel": "Commitments to Extend Credit [Member]" } } }, "localname": "CommitmentsToExtendCreditMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskScheduleOfContractAmountsRepresentCreditRiskDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CommonEquityTierOneCapital": { "auth_ref": [ "r673" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of Common Equity Tier 1 risk-based capital as defined by regulatory framework.", "label": "Common Equity Tier One Capital", "terseLabel": "Actual amount" } } }, "localname": "CommonEquityTierOneCapital", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommonEquityTierOneCapitalAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Common Equity Tier One Capital [Abstract]", "terseLabel": "Common Equity Tier One Capital [Abstract]" } } }, "localname": "CommonEquityTierOneCapitalAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CommonEquityTierOneCapitalRatio": { "auth_ref": [ "r673" ], "lang": { "en-us": { "role": { "documentation": "Ratio of Common Equity Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework.", "label": "Common Equity Tier One Capital Ratio", "terseLabel": "Actual ratio" } } }, "localname": "CommonEquityTierOneCapitalRatio", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "pureItemType" }, "us-gaap_CommonEquityTierOneCapitalRequiredForCapitalAdequacy": { "auth_ref": [ "r673", "r677" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of minimum Common Equity Tier 1 risk-based capital required for capital adequacy as defined by regulatory framework.", "label": "Common Equity Tier One Capital Required For Capital Adequacy", "terseLabel": "Minimum capital requirement amount" } } }, "localname": "CommonEquityTierOneCapitalRequiredForCapitalAdequacy", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommonEquityTierOneCapitalRequiredToBeWellCapitalized": { "auth_ref": [ "r673" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of minimum Common Equity Tier 1 risk-based capital categorized as well capitalized as defined by regulatory framework for prompt corrective action.", "label": "Common Equity Tier One Capital Required To Be Well Capitalized", "terseLabel": "Well capitalized under prompt corrective action provisions amount" } } }, "localname": "CommonEquityTierOneCapitalRequiredToBeWellCapitalized", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommonStockDividendsPerShareDeclared": { "auth_ref": [ "r295" ], "lang": { "en-us": { "role": { "documentation": "Aggregate dividends declared during the period for each share of common stock outstanding.", "label": "Common Stock Dividends Per Share Declared", "terseLabel": "Dividends per share", "verboseLabel": "Cash dividends (in dollars per share)" } } }, "localname": "CommonStockDividendsPerShareDeclared", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Common stock held by shareholders with par value plus amounts in excess of par value or issuance value (in cases of no-par value stock).", "label": "Common Stock Including Additional Paid In Capital [Member]", "terseLabel": "Common Stock and Additional Paid-In Capital [Member]" } } }, "localname": "CommonStockIncludingAdditionalPaidInCapitalMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_CommonStockParOrStatedValuePerShare": { "auth_ref": [ "r13" ], "lang": { "en-us": { "role": { "documentation": "Face amount or stated value per share of common stock.", "label": "Common Stock Par Or Stated Value Per Share", "terseLabel": "Common stock, par value (in dollars per share)" } } }, "localname": "CommonStockParOrStatedValuePerShare", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockSharesAuthorized": { "auth_ref": [ "r13" ], "lang": { "en-us": { "role": { "documentation": "The maximum number of common shares permitted to be issued by an entity's charter and bylaws.", "label": "Common Stock Shares Authorized", "terseLabel": "Common stock, shares authorized (in shares)" } } }, "localname": "CommonStockSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesIssued": { "auth_ref": [ "r13" ], "lang": { "en-us": { "role": { "documentation": "Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.", "label": "Common Stock Shares Issued", "terseLabel": "Common stock, shares issued (in shares)" } } }, "localname": "CommonStockSharesIssued", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesOutstanding": { "auth_ref": [ "r13", "r290" ], "lang": { "en-us": { "role": { "documentation": "Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.", "label": "Common Stock Shares Outstanding", "terseLabel": "Common stock, shares outstanding (in shares)" } } }, "localname": "CommonStockSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStocksIncludingAdditionalPaidInCapital": { "auth_ref": [ "r13", "r14", "r295" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10030.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of par value plus amounts in excess of par value or issuance value for common stock issued.", "label": "Common Stocks Including Additional Paid In Capital", "terseLabel": "Common stock, par value $3.13, and additional paid-in capital; authorized: 8,000,000 shares; issued and outstanding: 3,798,561 and 3,783,724 shares including 8,621 and 20,352 unvested shares, respectively", "verboseLabel": "Common stock and additional paid-in capital" } } }, "localname": "CommonStocksIncludingAdditionalPaidInCapital", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_Communication": { "auth_ref": [ "r70" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails": { "order": 10050.0, "parentTag": "us-gaap_OtherNoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of expense incurred in the period for communication, which is the exchange of information by several methods.", "label": "Communication", "terseLabel": "Telephone" } } }, "localname": "Communication", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CompensationAndRetirementDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Compensation And Retirement Disclosure [Abstract]" } } }, "localname": "CompensationAndRetirementDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]", "terseLabel": "Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]" } } }, "localname": "ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ComprehensiveIncomeNetOfTax": { "auth_ref": [ "r54", "r56", "r57", "r65", "r637", "r693" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.", "label": "Comprehensive Income Net Of Tax", "totalLabel": "Total comprehensive income" } } }, "localname": "ComprehensiveIncomeNetOfTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNoteTextBlock": { "auth_ref": [ "r64", "r72", "r636", "r692" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.", "label": "Comprehensive Income Note [Text Block]", "terseLabel": "Accumulated Other Comprehensive Income (Loss)" } } }, "localname": "ComprehensiveIncomeNoteTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLoss" ], "xbrltype": "textBlockItemType" }, "us-gaap_ComprehensiveIncomePolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for comprehensive income.", "label": "Comprehensive Income Policy Policy [Text Block]", "terseLabel": "Comprehensive Income" } } }, "localname": "ComprehensiveIncomePolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ConcentrationRiskDisclosureTextBlock": { "auth_ref": [ "r138" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.", "label": "Concentration Risk Disclosure [Text Block]", "terseLabel": "Concentration Risk" } } }, "localname": "ConcentrationRiskDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureConcentrationRisk" ], "xbrltype": "textBlockItemType" }, "us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock": { "auth_ref": [ "r1", "r101", "r470" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for condensed financial information, including the financial position, cash flows, and the results of operations of the registrant (parent company) as of the same dates or for the same periods for which audited consolidated financial statements are being presented. Alternatively, the details of this disclosure can be reported by the specific parent company taxonomy elements, indicating the appropriate date and period contexts in an instance document.", "label": "Condensed Financial Information Of Parent Company Only Disclosure [Text Block]", "terseLabel": "Parent Company Only Financial Statements" } } }, "localname": "CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatements" ], "xbrltype": "textBlockItemType" }, "us-gaap_ConsumerPortfolioSegmentMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Portfolio segment of the company's total financing receivables related to consumer receivables.", "label": "Consumer Portfolio Segment [Member]", "terseLabel": "Consumer [Member]" } } }, "localname": "ConsumerPortfolioSegmentMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CreditAndDebitCardMember": { "auth_ref": [ "r306" ], "lang": { "en-us": { "role": { "documentation": "Card issued to user to facilitate payment for purchase of product and service paid directly to merchant by issuer, or from user's checking account.", "label": "Credit And Debit Card [Member]", "terseLabel": "Intercharge Fee Income, Net [Member]" } } }, "localname": "CreditAndDebitCardMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "domainItemType" }, "us-gaap_CreditFacilityAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.", "label": "Credit Facility [Axis]", "terseLabel": "Credit Facility" } } }, "localname": "CreditFacilityAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_CreditFacilityDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Type of credit facility. Credit facilities provide capital to borrowers without the need to structure a loan for each borrowing.", "label": "Credit Facility [Domain]", "terseLabel": "Credit Facility" } } }, "localname": "CreditFacilityDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_CreditLossFinancialInstrumentPolicyTextBlock": { "auth_ref": [ "r239", "r240", "r241", "r242", "r243", "r246", "r250", "r251", "r252", "r253", "r259", "r260", "r261", "r263", "r264", "r265", "r271" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for credit loss on financial instrument measured at amortized cost basis, net investment in lease, off-balance sheet credit exposure, and available-for-sale debt security. Includes, but is not limited to, methodology used to estimate allowance for credit loss, how writeoff of uncollectible amount is recognized, and determination of past due status and nonaccrual status.", "label": "Credit Loss Financial Instrument Policy [Text Block]", "terseLabel": "Allowance for Loan Losses" } } }, "localname": "CreditLossFinancialInstrumentPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_CurrentIncomeTaxExpenseBenefit": { "auth_ref": [ "r94", "r444", "r454", "r456" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails": { "order": 10010.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.", "label": "Current Income Tax Expense Benefit", "terseLabel": "Current tax expense" } } }, "localname": "CurrentIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Debt Disclosure [Abstract]" } } }, "localname": "DebtDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_DebtDisclosureTextBlock": { "auth_ref": [ "r288" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.", "label": "Debt Disclosure [Text Block]", "terseLabel": "Junior Subordinated Debt" } } }, "localname": "DebtDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebt" ], "xbrltype": "textBlockItemType" }, "us-gaap_DebtInstrumentBasisSpreadOnVariableRate1": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percentage points added to the reference rate to compute the variable rate on the debt instrument.", "label": "Debt Instrument Basis Spread On Variable Rate1", "terseLabel": "Basis spread on variable rate" } } }, "localname": "DebtInstrumentBasisSpreadOnVariableRate1", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DebtInstrumentFaceAmount": { "auth_ref": [ "r542", "r544" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Face (par) amount of debt instrument at time of issuance.", "label": "Debt Instrument Face Amount", "verboseLabel": "Face amount" } } }, "localname": "DebtInstrumentFaceAmount", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtInstrumentLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Debt Instrument [Line Items]", "terseLabel": "Debt Instrument [Line Items]" } } }, "localname": "DebtInstrumentLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentTable": { "auth_ref": [ "r31", "r97", "r291", "r292", "r293", "r294", "r541", "r542", "r544", "r669" ], "lang": { "en-us": { "role": { "documentation": "A table or schedule providing information pertaining to long-term debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.", "label": "Debt Instrument [Table]", "terseLabel": "Debt Instrument [Table]" } } }, "localname": "DebtInstrumentTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger": { "auth_ref": [ "r216", "r270", "r273" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails": { "order": 10040.0, "parentTag": "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.", "label": "Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer", "terseLabel": "12 months or more, fair value" } } }, "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss": { "auth_ref": [ "r216", "r270" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails": { "order": 10020.0, "parentTag": "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.", "label": "Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss", "negatedLabel": "12 months or more, unrealized (losses)", "verboseLabel": "Unrealized loss position for more than 12 months" } } }, "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months": { "auth_ref": [ "r216", "r270", "r273" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails": { "order": 10030.0, "parentTag": "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.", "label": "Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months", "terseLabel": "Less than 12 months, fair value" } } }, "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss": { "auth_ref": [ "r216", "r270" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails": { "order": 10010.0, "parentTag": "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.", "label": "Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss", "negatedLabel": "Less than 12 months, unrealized (losses)" } } }, "localname": "DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss": { "auth_ref": [ "r218" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10210.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10210.0, "parentTag": "us-gaap_NoninterestIncome", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Debt Securities Available For Sale Realized Gain Loss", "negatedLabel": "Gains on sales/calls of securities available for sale", "terseLabel": "Gain on sale/call of securities available for sale, net", "verboseLabel": "Net gains on sales and/or calls of securities available for sale" } } }, "localname": "DebtSecuritiesAvailableForSaleRealizedGainLoss", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock": { "auth_ref": [ "r221" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Debt Securities Available For Sale Table [Text Block]", "terseLabel": "Summary of Amortized Cost and Fair Value of Securities Available for Sale, with Unrealized Gains and Losses" } } }, "localname": "DebtSecuritiesAvailableForSaleTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition": { "auth_ref": [ "r212", "r266", "r273" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.", "label": "Debt Securities Available For Sale Unrealized Loss Position", "totalLabel": "Total, fair value", "verboseLabel": "Aggregate fair value" } } }, "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPosition", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss": { "auth_ref": [ "r213", "r267" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.", "label": "Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss", "negatedTotalLabel": "Total, unrealized (losses)" } } }, "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock": { "auth_ref": [ "r211", "r269", "r273" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.", "label": "Debt Securities Available For Sale Unrealized Loss Position Fair Value Table [Text Block]", "terseLabel": "Schedule of Securities with Gross Unrealized Losses and Fair value, Aggregated by Investment Category and Length of Time in Continuous Unrealized Loss Position" } } }, "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions": { "auth_ref": [ "r214", "r268" ], "lang": { "en-us": { "role": { "documentation": "Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.", "label": "Debt Securities Available For Sale Unrealized Loss Position Number Of Positions", "terseLabel": "Number of debt securities temporarily impaired" } } }, "localname": "DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "us-gaap_DebtSecuritiesMember": { "auth_ref": [ "r221" ], "lang": { "en-us": { "role": { "documentation": "Debt instrument issued by corporations, governments and governmental agencies, municipalities, and other institutions.", "label": "Debt Securities [Member]", "terseLabel": "5 Debt Securities [Member]" } } }, "localname": "DebtSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense": { "auth_ref": [ "r309", "r405" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The compensation expense recognized during the period pertaining to the deferred compensation arrangement.", "label": "Deferred Compensation Arrangement With Individual Compensation Expense", "terseLabel": "Deferred compensation expense" } } }, "localname": "DeferredCompensationArrangementWithIndividualCompensationExpense", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredCompensationArrangementsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Deferred Compensation Arrangements [Abstract]", "terseLabel": "Deferred Compensation Plan [Abstract]" } } }, "localname": "DeferredCompensationArrangementsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DeferredCompensationCashBasedArrangementsLiabilityCurrent": { "auth_ref": [ "r308", "r310" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements payable within one year (or the normal operating cycle, if longer). Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date.", "label": "Deferred Compensation Cash Based Arrangements Liability Current", "terseLabel": "Accrued liability for deferred compensation program" } } }, "localname": "DeferredCompensationCashBasedArrangementsLiabilityCurrent", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredIncomeTaxExpenseBenefit": { "auth_ref": [ "r87", "r94", "r445", "r454", "r455", "r456" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails": { "order": 10020.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10200.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Deferred Income Tax Expense Benefit", "terseLabel": "Deferred tax (benefit) expense", "verboseLabel": "Deferred taxes" } } }, "localname": "DeferredIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredIncomeTaxLiabilities": { "auth_ref": [ "r10", "r11", "r437", "r615", "r681" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10020.0, "parentTag": "us-gaap_DeferredTaxAssetsLiabilitiesNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences.", "label": "Deferred Income Tax Liabilities", "totalLabel": "Total" } } }, "localname": "DeferredIncomeTaxLiabilities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsGross": { "auth_ref": [ "r438" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10010.0, "parentTag": "us-gaap_DeferredTaxAssetsLiabilitiesNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.", "label": "Deferred Tax Assets Gross", "totalLabel": "Total" } } }, "localname": "DeferredTaxAssetsGross", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsLiabilitiesNet": { "auth_ref": [ "r439" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.", "label": "Deferred Tax Assets Liabilities Net", "totalLabel": "Net deferred tax assets" } } }, "localname": "DeferredTaxAssetsLiabilitiesNet", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsNetAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Deferred Tax Assets Net [Abstract]", "terseLabel": "Deferred tax assets [Abstract]" } } }, "localname": "DeferredTaxAssetsNetAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DeferredTaxAssetsOther": { "auth_ref": [ "r442", "r443" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10120.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.", "label": "Deferred Tax Assets Other", "terseLabel": "Other" } } }, "localname": "DeferredTaxAssetsOther", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10100.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment.", "label": "Deferred Tax Assets Property Plant And Equipment", "terseLabel": "Accumulated depreciation" } } }, "localname": "DeferredTaxAssetsPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences": { "auth_ref": [ "r442", "r443" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10070.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensated absences (includes, but not limited to, sick and personal days).", "label": "Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Compensated Absences", "terseLabel": "Accrued vacation" } } }, "localname": "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions": { "auth_ref": [ "r442" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10080.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from pension benefits.", "label": "Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions", "terseLabel": "Other assets, deferred income tax benefit", "verboseLabel": "SERP obligation" } } }, "localname": "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost": { "auth_ref": [ "r442", "r443" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10110.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.", "label": "Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost", "terseLabel": "Restricted stock" } } }, "localname": "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses": { "auth_ref": [ "r442", "r443" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10050.0, "parentTag": "us-gaap_DeferredTaxAssetsGross", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the provision for loan losses.", "label": "Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses", "terseLabel": "Allowance for loan losses" } } }, "localname": "DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredTaxLiabilitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Deferred Tax Liabilities [Abstract]", "terseLabel": "Deferred tax liabilities [Abstract]" } } }, "localname": "DeferredTaxLiabilitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DeferredTaxLiabilitiesOther": { "auth_ref": [ "r442", "r443" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails": { "order": 10040.0, "parentTag": "us-gaap_DeferredIncomeTaxLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences classified as other.", "label": "Deferred Tax Liabilities Other", "terseLabel": "Other" } } }, "localname": "DeferredTaxLiabilitiesOther", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesNetDeferredTaxAssetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossAfterTaxAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Defined Benefit Plan Accumulated Other Comprehensive Income Loss After Tax [Abstract]", "terseLabel": "Amounts Recognized in Accumulated Other Comprehensive Income (Loss) [Abstract]" } } }, "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossAfterTaxAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax": { "auth_ref": [ "r48", "r359" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": 12120.0, "parentTag": "us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.", "label": "Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses After Tax", "negatedLabel": "Net gain" } } }, "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax": { "auth_ref": [ "r48", "r359" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": 12130.0, "parentTag": "us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).", "label": "Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax", "terseLabel": "Prior service cost" } } }, "localname": "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanActuarialGainLoss": { "auth_ref": [ "r321" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.", "label": "Defined Benefit Plan Actuarial Gain Loss", "negatedLabel": "Actuarial gain" } } }, "localname": "DefinedBenefitPlanActuarialGainLoss", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit": { "auth_ref": [ "r315", "r355", "r381", "r386", "r387" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": 12110.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.", "label": "Defined Benefit Plan Amortization Of Prior Service Cost Credit", "terseLabel": "Amortization of prior service cost" } } }, "localname": "DefinedBenefitPlanAmortizationOfPriorServiceCostCredit", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Defined Benefit Plan Amounts Recognized In Balance Sheet [Abstract]", "terseLabel": "Amounts Recognized in the Balance Sheets [Abstract]" } } }, "localname": "DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Defined Benefit Plan Amounts Recognized In Other Comprehensive Income [Abstract]", "terseLabel": "Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income [Abstract]" } } }, "localname": "DefinedBenefitPlanAmountsRecognizedInOtherComprehensiveIncomeAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate": { "auth_ref": [ "r361" ], "lang": { "en-us": { "role": { "documentation": "Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.", "label": "Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate", "terseLabel": "Discount rate used for benefit obligation" } } }, "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease": { "auth_ref": [ "r362" ], "lang": { "en-us": { "role": { "documentation": "Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.", "label": "Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase", "terseLabel": "Rate of compensation increase for net periodic benefit cost and benefit obligation" } } }, "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate": { "auth_ref": [ "r361" ], "lang": { "en-us": { "role": { "documentation": "Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.", "label": "Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate", "terseLabel": "Discount rate used for net periodic benefit cost" } } }, "localname": "DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedBenefitPlanBenefitObligation": { "auth_ref": [ "r316" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.", "label": "Defined Benefit Plan Benefit Obligation", "periodEndLabel": "Benefit obligation, ending", "periodStartLabel": "Benefit obligation, beginning" } } }, "localname": "DefinedBenefitPlanBenefitObligation", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid": { "auth_ref": [ "r323", "r390" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.", "label": "Defined Benefit Plan Benefit Obligation Benefits Paid", "negatedLabel": "Benefits paid" } } }, "localname": "DefinedBenefitPlanBenefitObligationBenefitsPaid", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.", "label": "Defined Benefit Plan Change In Benefit Obligation Roll Forward", "terseLabel": "Changes in Benefit Obligations [Roll Forward]" } } }, "localname": "DefinedBenefitPlanChangeInBenefitObligationRollForward", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.", "label": "Defined Benefit Plan Change In Fair Value Of Plan Assets Roll Forward", "terseLabel": "Changes in Plan Assets [Roll Forward]" } } }, "localname": "DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanContributionsByEmployer": { "auth_ref": [ "r331", "r339", "r341", "r384", "r386", "r387" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of contribution received by defined benefit plan from employer which increases plan assets.", "label": "Defined Benefit Plan Contributions By Employer", "terseLabel": "Employer contributions" } } }, "localname": "DefinedBenefitPlanContributionsByEmployer", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanDisclosureLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Defined Benefit Plan Disclosure [Line Items]", "terseLabel": "Defined Benefit Plan Disclosure [Line Items]" } } }, "localname": "DefinedBenefitPlanDisclosureLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfEstimatedFutureBenefitPaymentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Defined Benefit Plan Estimated Future Benefit Payments [Abstract]", "terseLabel": "Estimated Future Benefit Payments [Abstract]" } } }, "localname": "DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfEstimatedFutureBenefitPaymentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths": { "auth_ref": [ "r348" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.", "label": "Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months", "terseLabel": "2021" } } }, "localname": "DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfEstimatedFutureBenefitPaymentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanFairValueOfPlanAssets": { "auth_ref": [ "r328", "r339", "r341", "r342", "r386" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.", "label": "Defined Benefit Plan Fair Value Of Plan Assets", "periodEndLabel": "Fair value of plan assets, ending", "periodStartLabel": "Fair value of plan assets, beginning" } } }, "localname": "DefinedBenefitPlanFairValueOfPlanAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanFundedStatusOfPlan": { "auth_ref": [ "r313", "r337", "r386" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.", "label": "Defined Benefit Plan Funded Status Of Plan", "periodEndLabel": "Funded status, ending" } } }, "localname": "DefinedBenefitPlanFundedStatusOfPlan", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanInterestCost": { "auth_ref": [ "r315", "r319", "r352", "r378", "r386", "r387" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": 12100.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cost recognized for passage of time related to defined benefit plan.", "label": "Defined Benefit Plan Interest Cost", "terseLabel": "Interest cost" } } }, "localname": "DefinedBenefitPlanInterestCost", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost": { "auth_ref": [ "r350", "r376", "r386", "r387" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of net periodic benefit cost (credit) for defined benefit plan.", "label": "Defined Benefit Plan Net Periodic Benefit Cost", "totalLabel": "Net periodic benefit cost" } } }, "localname": "DefinedBenefitPlanNetPeriodicBenefitCost", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Defined Benefit Plan Net Periodic Benefit Cost [Abstract]", "terseLabel": "Components of Net Periodic Benefit Cost [Abstract]" } } }, "localname": "DefinedBenefitPlanNetPeriodicBenefitCostAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid": { "auth_ref": [ "r333", "r390" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.", "label": "Defined Benefit Plan Plan Assets Benefits Paid", "negatedLabel": "Benefits paid" } } }, "localname": "DefinedBenefitPlanPlanAssetsBenefitsPaid", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanServiceCost": { "auth_ref": [ "r317", "r351", "r377", "r386", "r387" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": 12090.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.", "label": "Defined Benefit Plan Service Cost", "terseLabel": "Service cost" } } }, "localname": "DefinedBenefitPlanServiceCost", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Defined Benefit Plan Weighted Average Assumptions Used In Calculating Benefit Obligation [Abstract]", "terseLabel": "Weighted-Average Assumptions [Abstract]" } } }, "localname": "DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Defined Benefit Plan Weighted Average Assumptions Used In Calculating Net Periodic Benefit Cost [Abstract]", "terseLabel": "Weighted-Average Assumptions for Net Periodic Benefit Cost [Abstract]" } } }, "localname": "DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedContributionPlanCostRecognized": { "auth_ref": [ "r391" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cost for defined contribution plan.", "label": "Defined Contribution Plan Cost Recognized", "terseLabel": "401(k) expenses" } } }, "localname": "DefinedContributionPlanCostRecognized", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedContributionPlanDisclosureLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Defined Contribution Plan Disclosure [Line Items]", "terseLabel": "Defined Contribution Plan Disclosure [Line Items]" } } }, "localname": "DefinedContributionPlanDisclosureLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.", "label": "Defined Contribution Plan Employer Matching Contribution Percent", "terseLabel": "Percent of employee's compensation deferred that receives company match" } } }, "localname": "DefinedContributionPlanEmployerMatchingContributionPercent", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Percentage employer matches of the employee's percentage contribution matched.", "label": "Defined Contribution Plan Employer Matching Contribution Percent Of Match", "terseLabel": "Employer matching contribution" } } }, "localname": "DefinedContributionPlanEmployerMatchingContributionPercentOfMatch", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.", "label": "Defined Contribution Plan Maximum Annual Contributions Per Employee Percent", "terseLabel": "Annual contribution per employee" } } }, "localname": "DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DefinedContributionPlanTable": { "auth_ref": [ "r391" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about defined contribution pension plans or defined contribution other postretirement plans, separately for pension plans and other postretirement benefit plans.", "label": "Defined Contribution Plan [Table]", "terseLabel": "Defined Contribution Plan [Table]" } } }, "localname": "DefinedContributionPlanTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DepositAccountMember": { "auth_ref": [ "r306" ], "lang": { "en-us": { "role": { "documentation": "Bank account at depository institution allowing money to be withdrawn or deposited by account holder.", "label": "Deposit Account [Member]", "terseLabel": "Service Charges on Deposit Accounts [Member]" } } }, "localname": "DepositAccountMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "domainItemType" }, "us-gaap_DepositLiabilitiesDisclosuresTextBlock": { "auth_ref": [ "r623", "r666" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for deposit liabilities including data and tables. It may include a description of the entity's deposit liabilities, the aggregate amount of time deposits (including certificates of deposit) in denominations of $100,000 or more at the balance sheet date; the aggregate amount of any demand deposits that have been reclassified as loan balances, such as overdrafts, at the balance sheet date; deposits that are received on terms other than those in the normal course of business, the amount of accrued interest on deposit liabilities; securities, mortgage loans or other financial instruments that serve as collateral for deposits; for time deposits having a remaining term of more than one year, the aggregate amount of maturities for each of the five years following the balance sheet date; and the weighted average interest rate for all deposit liabilities held by the entity.", "label": "Deposit Liabilities Disclosures [Text Block]", "terseLabel": "Deposits" } } }, "localname": "DepositLiabilitiesDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDeposits" ], "xbrltype": "textBlockItemType" }, "us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1": { "auth_ref": [ "r665" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of deposits held by the entity that have been reclassified as loan balances receivable, for example, but not limited to, overdrafts receivable.", "label": "Deposit Liabilities Reclassified As Loans Receivable1", "terseLabel": "Overdraft deposits reclassified to loans" } } }, "localname": "DepositLiabilitiesReclassifiedAsLoansReceivable1", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_Deposits": { "auth_ref": [ "r623" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10060.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.", "label": "Deposits", "totalLabel": "Total deposits" } } }, "localname": "Deposits", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DepositsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Deposits [Abstract]", "terseLabel": "Deposits:", "verboseLabel": "Deposits [Abstract]" } } }, "localname": "DepositsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_DepositsFairValueDisclosure": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10020.0, "parentTag": "us-gaap_FinancialLiabilitiesFairValueDisclosure", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.", "label": "Deposits Fair Value Disclosure", "terseLabel": "Deposits" } } }, "localname": "DepositsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DepositsNegotiableOrderOfWithdrawalNOW": { "auth_ref": [ "r623" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10120.0, "parentTag": "us-gaap_InterestBearingDepositLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deposits in interest-bearing transaction accounts at banks or savings and loans, that are restricted in regard to ownership and can usually only be held by individuals, nonprofit entities and governments. Negotiable order of withdrawal accounts differ from money market demand accounts as they typically have higher reserve requirements and no limit on the number of checks that can be written.", "label": "Deposits Negotiable Order Of Withdrawal N O W", "terseLabel": "Checking" } } }, "localname": "DepositsNegotiableOrderOfWithdrawalNOW", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DepositsSavingsDeposits": { "auth_ref": [ "r623" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10130.0, "parentTag": "us-gaap_InterestBearingDepositLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of interest bearing deposits with no stated maturity, which may include passbook and statement savings accounts and money-market deposit accounts (MMDAs).", "label": "Deposits Savings Deposits", "terseLabel": "Savings and money market accounts" } } }, "localname": "DepositsSavingsDeposits", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DepreciationAndAmortization": { "auth_ref": [ "r87", "r274" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10160.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.", "label": "Depreciation And Amortization", "terseLabel": "Depreciation and amortization" } } }, "localname": "DepreciationAndAmortization", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeBasisSpreadOnVariableRate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.", "label": "Derivative Basis Spread On Variable Rate", "terseLabel": "Basis spread on variable rate" } } }, "localname": "DerivativeBasisSpreadOnVariableRate", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DerivativeCollateralRightToReclaimCash": { "auth_ref": [ "r35", "r37", "r505" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.", "label": "Derivative Collateral Right To Reclaim Cash", "terseLabel": "Cash collateral" } } }, "localname": "DerivativeCollateralRightToReclaimCash", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeContractTypeDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Financial instrument or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.", "label": "Derivative Contract Type [Domain]", "terseLabel": "Derivative Contract" } } }, "localname": "DerivativeContractTypeDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DerivativeFairValueOfDerivativeNet": { "auth_ref": [ "r527" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value of the assets less the liabilities of a derivative or group of derivatives.", "label": "Derivative Fair Value Of Derivative Net", "terseLabel": "Fair Value" } } }, "localname": "DerivativeFairValueOfDerivativeNet", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeFixedInterestRate": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Fixed interest rate related to the interest rate derivative.", "label": "Derivative Fixed Interest Rate", "terseLabel": "Fixed interest rate" } } }, "localname": "DerivativeFixedInterestRate", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "us-gaap_DerivativeInstrumentDetailAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Derivative Instrument Detail [Abstract]", "terseLabel": "Derivative Instruments and Hedging Activities [Abstract]" } } }, "localname": "DerivativeInstrumentDetailAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentRiskAxis": { "auth_ref": [ "r493", "r495", "r499", "r501" ], "lang": { "en-us": { "role": { "documentation": "Information by type of derivative contract.", "label": "Derivative Instrument Risk [Axis]", "terseLabel": "Derivative Instrument" } } }, "localname": "DerivativeInstrumentRiskAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Derivative Instruments And Hedging Activities Disclosure [Abstract]" } } }, "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock": { "auth_ref": [ "r511" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.", "label": "Derivative Instruments And Hedging Activities Disclosure [Text Block]", "terseLabel": "Derivative Instruments and Hedging Activities" } } }, "localname": "DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivities" ], "xbrltype": "textBlockItemType" }, "us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis": { "auth_ref": [ "r490", "r493", "r499" ], "lang": { "en-us": { "role": { "documentation": "Information by type of hedging relationship.", "label": "Derivative Instruments Gain Loss By Hedging Relationship [Axis]", "terseLabel": "Hedging Relationship" } } }, "localname": "DerivativeInstrumentsGainLossByHedgingRelationshipAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet": { "auth_ref": [ "r498", "r509" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.", "label": "Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net", "terseLabel": "Ineffectiveness on hedges" } } }, "localname": "DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeLiabilities": { "auth_ref": [ "r34", "r36", "r527" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10010.0, "parentTag": "us-gaap_FinancialLiabilitiesFairValueDisclosure", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.", "label": "Derivative Liabilities", "terseLabel": "Interest rate swaps" } } }, "localname": "DerivativeLiabilities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Derivative [Line Items]", "terseLabel": "Derivative [Line Items]" } } }, "localname": "DerivativeLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativeMaturityDates": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Date the derivative contract matures, in CCYY-MM-DD format.", "label": "Derivative Maturity Dates", "terseLabel": "Expiration date" } } }, "localname": "DerivativeMaturityDates", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "dateItemType" }, "us-gaap_DerivativeNotionalAmount": { "auth_ref": [ "r485", "r487" ], "lang": { "en-us": { "role": { "documentation": "Nominal or face amount used to calculate payment on derivative.", "label": "Derivative Notional Amount", "terseLabel": "Notional/contract amount", "verboseLabel": "Notional/contract amount" } } }, "localname": "DerivativeNotionalAmount", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeNumberOfInstrumentsHeld": { "auth_ref": [ "r485", "r487" ], "lang": { "en-us": { "role": { "documentation": "The number of derivative instruments of a particular group held by the entity.", "label": "Derivative Number Of Instruments Held", "terseLabel": "Number of swap agreements" } } }, "localname": "DerivativeNumberOfInstrumentsHeld", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "us-gaap_DerivativeTable": { "auth_ref": [ "r484", "r486", "r487", "r490", "r491", "r497", "r499", "r503", "r506", "r510" ], "lang": { "en-us": { "role": { "documentation": "Schedule that describes and identifies a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.", "label": "Derivative [Table]", "terseLabel": "Derivative [Table]" } } }, "localname": "DerivativeTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativesFairValueLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Derivatives Fair Value [Line Items]", "terseLabel": "Derivatives Fair Value [Line Items]" } } }, "localname": "DerivativesFairValueLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_DerivativesPolicyTextBlock": { "auth_ref": [ "r91", "r100", "r484", "r486", "r490", "r491", "r504" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for its derivative instruments and hedging activities.", "label": "Derivatives Policy [Text Block]", "terseLabel": "Derivative Financial Instruments" } } }, "localname": "DerivativesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock": { "auth_ref": [ "r428" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for share-based payment arrangement.", "label": "Disclosure Of Compensation Related Costs Share Based Payments [Text Block]", "terseLabel": "Share-based Compensation" } } }, "localname": "DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensation" ], "xbrltype": "textBlockItemType" }, "us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]" } } }, "localname": "DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_DisclosureOfRestrictionsOnDividendsLoansAndAdvancesDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Disclosure Of Restrictions On Dividends Loans And Advances Disclosure [Abstract]" } } }, "localname": "DisclosureOfRestrictionsOnDividendsLoansAndAdvancesDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_DividendIncomeOperating": { "auth_ref": [ "r649" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10350.0, "parentTag": "us-gaap_InterestAndDividendIncomeOperating", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of operating dividend income on securities.", "label": "Dividend Income Operating", "terseLabel": "Dividends" } } }, "localname": "DividendIncomeOperating", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_DividendsCommonStockCash": { "auth_ref": [ "r295" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.", "label": "Dividends Common Stock Cash", "negatedLabel": "Cash dividends" } } }, "localname": "DividendsCommonStockCash", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_DoubtfulMember": { "auth_ref": [ "r177", "r254" ], "lang": { "en-us": { "role": { "documentation": "A category of financing receivables that have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.", "label": "Doubtful [Member]", "terseLabel": "Doubtful [Member]" } } }, "localname": "DoubtfulMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_EarningsPerShareAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Earnings Per Share [Abstract]" } } }, "localname": "EarningsPerShareAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareBasic": { "auth_ref": [ "r66", "r111", "r112", "r113", "r114", "r115", "r120", "r122", "r127", "r128", "r129", "r134", "r135", "r638", "r694" ], "lang": { "en-us": { "role": { "documentation": "The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.", "label": "Earnings Per Share Basic", "terseLabel": "Earnings per share, basic", "verboseLabel": "Basic earnings per share (in dollars per share)" } } }, "localname": "EarningsPerShareBasic", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareWeightedAverageNumberOfSharesUsedInComputingEarningsPerShareDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerShareDiluted": { "auth_ref": [ "r66", "r111", "r112", "r113", "r114", "r115", "r122", "r127", "r128", "r129", "r134", "r135", "r638", "r694" ], "lang": { "en-us": { "role": { "documentation": "The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.", "label": "Earnings Per Share Diluted", "terseLabel": "Earnings per share, diluted", "verboseLabel": "Diluted earnings per share (in dollars per share)" } } }, "localname": "EarningsPerShareDiluted", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareWeightedAverageNumberOfSharesUsedInComputingEarningsPerShareDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerSharePolicyTextBlock": { "auth_ref": [ "r91", "r130", "r132" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.", "label": "Earnings Per Share Policy [Text Block]", "terseLabel": "Earnings Per Share" } } }, "localname": "EarningsPerSharePolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_EarningsPerShareReconciliationAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Earnings Per Share Reconciliation [Abstract]", "terseLabel": "Per Share Amount [Abstract]" } } }, "localname": "EarningsPerShareReconciliationAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareWeightedAverageNumberOfSharesUsedInComputingEarningsPerShareDetails" ], "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareTextBlock": { "auth_ref": [ "r130", "r132", "r133", "r136" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for earnings per share.", "label": "Earnings Per Share [Text Block]", "terseLabel": "Earnings Per Share" } } }, "localname": "EarningsPerShareTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShare" ], "xbrltype": "textBlockItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized": { "auth_ref": [ "r417" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cost not yet recognized for nonvested award under share-based payment arrangement.", "label": "Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized", "terseLabel": "Unrecognized compensation cost" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1": { "auth_ref": [ "r417" ], "lang": { "en-us": { "role": { "documentation": "Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1", "terseLabel": "Recognition period for total unrecognized compensation costs" } } }, "localname": "EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "us-gaap_EquipmentExpense": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10080.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "This element represents equipment expense including depreciation, repairs, rentals, and service contract costs. This item also includes equipment purchases which do not qualify for capitalization in accordance with the entity's accounting policy. This item may also include furniture expenses.", "label": "Equipment Expense", "terseLabel": "Furniture and equipment" } } }, "localname": "EquipmentExpense", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_EquityComponentDomain": { "auth_ref": [ "r103", "r104", "r105", "r108", "r116", "r118", "r137", "r235", "r290", "r295", "r423", "r424", "r425", "r449", "r450", "r533", "r534", "r535", "r536", "r537", "r539", "r706", "r707", "r708" ], "lang": { "en-us": { "role": { "documentation": "Components of equity are the parts of the total Equity balance including that which is allocated to common, preferred, treasury stock, retained earnings, etc.", "label": "Equity Component [Domain]", "terseLabel": "Equity Component" } } }, "localname": "EquityComponentDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_EstimateOfFairValueFairValueDisclosureMember": { "auth_ref": [ "r527" ], "lang": { "en-us": { "role": { "documentation": "Measured as an estimate of fair value.", "label": "Estimate Of Fair Value Fair Value Disclosure [Member]", "terseLabel": "Fair Value [Member]" } } }, "localname": "EstimateOfFairValueFairValueDisclosureMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]", "terseLabel": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": { "auth_ref": [ "r512", "r513", "r514", "r522" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about asset and liability measured at fair value on recurring and nonrecurring basis.", "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]", "terseLabel": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]", "terseLabel": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable": { "auth_ref": [ "r515" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.", "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table]", "terseLabel": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock": { "auth_ref": [ "r515" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.", "label": "Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques Table [Text Block]", "terseLabel": "Summary of Quantitative Information About Level 3 Fair Value Measurements" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock": { "auth_ref": [ "r512", "r513", "r515" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3).", "label": "Fair Value Assets Measured On Nonrecurring Basis [Text Block]", "terseLabel": "Summary of Financial Assets Measured at Fair Value on a Nonrecurring Basis" } } }, "localname": "FairValueAssetsMeasuredOnNonrecurringBasisTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain": { "auth_ref": [ "r518" ], "lang": { "en-us": { "role": { "documentation": "Class of asset.", "label": "Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain]", "terseLabel": "Asset Class" } } }, "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]", "terseLabel": "Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]" } } }, "localname": "FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByAssetClassAxis": { "auth_ref": [ "r512", "r522" ], "lang": { "en-us": { "role": { "documentation": "Information by class of asset.", "label": "Fair Value By Asset Class [Axis]", "terseLabel": "Asset Class" } } }, "localname": "FairValueByAssetClassAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByBalanceSheetGroupingTable": { "auth_ref": [ "r512", "r528", "r529" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.", "label": "Fair Value By Balance Sheet Grouping [Table]", "terseLabel": "Fair Value By Balance Sheet Grouping [Table]" } } }, "localname": "FairValueByBalanceSheetGroupingTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByBalanceSheetGroupingTextBlock": { "auth_ref": [ "r512", "r528" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.", "label": "Fair Value By Balance Sheet Grouping [Text Block]", "terseLabel": "Schedule of Estimated Fair Values of Financial Instruments" } } }, "localname": "FairValueByBalanceSheetGroupingTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueByFairValueHierarchyLevelAxis": { "auth_ref": [ "r339", "r341", "r342", "r343", "r344", "r345", "r346", "r386", "r513", "r573", "r574", "r575" ], "lang": { "en-us": { "role": { "documentation": "Information by level within fair value hierarchy and fair value measured at net asset value per share as practical expedient.", "label": "Fair Value By Fair Value Hierarchy Level [Axis]", "terseLabel": "Fair Value Hierarchy and NAV" } } }, "localname": "FairValueByFairValueHierarchyLevelAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByMeasurementBasisAxis": { "auth_ref": [ "r512", "r523" ], "lang": { "en-us": { "role": { "documentation": "Information by measurement basis.", "label": "Fair Value By Measurement Basis [Axis]", "terseLabel": "Measurement Basis" } } }, "localname": "FairValueByMeasurementBasisAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueByMeasurementFrequencyAxis": { "auth_ref": [ "r512", "r513", "r516", "r517", "r524" ], "lang": { "en-us": { "role": { "documentation": "Information by measurement frequency.", "label": "Fair Value By Measurement Frequency [Axis]", "terseLabel": "Measurement Frequency" } } }, "localname": "FairValueByMeasurementFrequencyAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueDisclosureItemAmountsDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Measurement basis, for example, but not limited to, reported value, fair value, portion at fair value, portion at other than fair value.", "label": "Fair Value Disclosure Item Amounts [Domain]", "terseLabel": "Fair Value Measurement" } } }, "localname": "FairValueDisclosureItemAmountsDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability": { "auth_ref": [ "r527" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.", "label": "Fair Value Disclosure Offbalance Sheet Risks Amount Liability", "terseLabel": "Financial instruments whose contract amounts represent credit risk" } } }, "localname": "FairValueDisclosureOffbalanceSheetRisksAmountLiability", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskScheduleOfContractAmountsRepresentCreditRiskDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueDisclosuresAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Fair Value Disclosures [Abstract]" } } }, "localname": "FairValueDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_FairValueDisclosuresTextBlock": { "auth_ref": [ "r521" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.", "label": "Fair Value Disclosures [Text Block]", "terseLabel": "Fair Value Measurements" } } }, "localname": "FairValueDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurements" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueHedgingMember": { "auth_ref": [ "r488" ], "lang": { "en-us": { "role": { "documentation": "A hedge of the exposure to changes in the fair value of a recognized asset or liability, or of an unrecognized firm commitment, that are attributable to a particular risk.", "label": "Fair Value Hedging [Member]", "terseLabel": "Fair Value Hedging [Member]" } } }, "localname": "FairValueHedgingMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel1Member": { "auth_ref": [ "r339", "r341", "r346", "r386", "r513", "r573" ], "lang": { "en-us": { "role": { "documentation": "Quoted prices in active markets for identical assets or liabilities that the reporting entity can access at the measurement date.", "label": "Fair Value Inputs Level1 [Member]", "terseLabel": "Level 1 [Member]" } } }, "localname": "FairValueInputsLevel1Member", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel2Member": { "auth_ref": [ "r339", "r341", "r346", "r386", "r513", "r574" ], "lang": { "en-us": { "role": { "documentation": "Inputs other than quoted prices included within level 1 that are observable for an asset or liability, either directly or indirectly, including, but not limited to, quoted prices for similar assets or liabilities in active markets, or quoted prices for identical or similar assets or liabilities in inactive markets.", "label": "Fair Value Inputs Level2 [Member]", "terseLabel": "Level 2 [Member]" } } }, "localname": "FairValueInputsLevel2Member", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel3Member": { "auth_ref": [ "r339", "r341", "r342", "r343", "r344", "r345", "r346", "r386", "r513", "r575" ], "lang": { "en-us": { "role": { "documentation": "Unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value Inputs Level3 [Member]", "terseLabel": "Level 3 [Member]" } } }, "localname": "FairValueInputsLevel3Member", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsQuantitativeInformationAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Fair Value Inputs Quantitative Information [Abstract]", "terseLabel": "Quantitative Information About Level 3 Fair Value Measurements [Abstract]" } } }, "localname": "FairValueInputsQuantitativeInformationAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueMeasurementFrequencyDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Measurement frequency.", "label": "Fair Value Measurement Frequency [Domain]", "terseLabel": "Measurement Frequency" } } }, "localname": "FairValueMeasurementFrequencyDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueMeasurementPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for fair value measurements of financial and non-financial assets, liabilities and instruments classified in shareholders' equity. Disclosures include, but are not limited to, how an entity that manages a group of financial assets and liabilities on the basis of its net exposure measures the fair value of those assets and liabilities.", "label": "Fair Value Measurement Policy Policy [Text Block]", "terseLabel": "Fair Value Measurements" } } }, "localname": "FairValueMeasurementPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": { "auth_ref": [ "r339", "r341", "r342", "r343", "r344", "r345", "r346", "r386", "r573", "r574", "r575" ], "lang": { "en-us": { "role": { "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.", "label": "Fair Value Measurements Fair Value Hierarchy [Domain]", "terseLabel": "Fair Value Hierarchy and NAV" } } }, "localname": "FairValueMeasurementsFairValueHierarchyDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueMeasurementsNonrecurringMember": { "auth_ref": [ "r512", "r513", "r516", "r517", "r520", "r524" ], "lang": { "en-us": { "role": { "documentation": "Infrequent fair value measurement. Includes, but is not limited to, fair value adjustment for impairment of asset, liability or equity, not frequently measured at fair value.", "label": "Fair Value Measurements Nonrecurring [Member]", "terseLabel": "Fair Value on a Nonrecurring Basis [Member]" } } }, "localname": "FairValueMeasurementsNonrecurringMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueMeasurementsNonrecurringValueMeasurementAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Fair Value Measurements Nonrecurring Value Measurement [Abstract]", "terseLabel": "Financial Assets Recorded on a Nonrecurring Basis [Abstract]" } } }, "localname": "FairValueMeasurementsNonrecurringValueMeasurementAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueMeasurementsRecurringMember": { "auth_ref": [ "r521", "r524" ], "lang": { "en-us": { "role": { "documentation": "Frequent fair value measurement. Includes, but is not limited to, fair value adjustment for impairment of asset, liability or equity, frequently measured at fair value.", "label": "Fair Value Measurements Recurring [Member]", "terseLabel": "Fair Value on a Recurring Basis [Member]" } } }, "localname": "FairValueMeasurementsRecurringMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueMeasurementsValuationProcessesDescription": { "auth_ref": [ "r519" ], "lang": { "en-us": { "role": { "documentation": "Description of the valuation processes in place for fair value measurements categorized within Level 3 of the fair value hierarchy.", "label": "Fair Value Measurements Valuation Processes Description", "terseLabel": "Unobservable Input" } } }, "localname": "FairValueMeasurementsValuationProcessesDescription", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]", "terseLabel": "Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]" } } }, "localname": "FairValueOffBalanceSheetRisksDisclosureInformationLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskScheduleOfContractAmountsRepresentCreditRiskDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable": { "auth_ref": [ "r492", "r497", "r507" ], "lang": { "en-us": { "role": { "documentation": "Schedule that discloses the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position.", "label": "Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table]", "terseLabel": "Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table]" } } }, "localname": "FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FederalDepositInsuranceCorporationPremiumExpense": { "auth_ref": [ "r648" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10120.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of expense for Federal Deposit Insurance Corporation (FDIC) insurance.", "label": "Federal Deposit Insurance Corporation Premium Expense", "terseLabel": "Federal Deposit Insurance Corporation assessment" } } }, "localname": "FederalDepositInsuranceCorporationPremiumExpense", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_FederalFundsPurchased": { "auth_ref": [ "r624" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of short term borrowing where a bank borrows, at the federal funds rate, from another bank.", "label": "Federal Funds Purchased", "terseLabel": "Federal funds lines of credit in use" } } }, "localname": "FederalFundsPurchased", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FederalFundsSold": { "auth_ref": [ "r630" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10170.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount outstanding of funds lent to other depository institutions, securities brokers, or securities dealers in the form of Federal Funds sold; for example, immediately available funds lent under agreements or contracts that mature in one business day or roll over under a continuing contract, regardless of the nature of the transaction or the collateral involved, excluding overnight lending for commercial and industrial purposes. Also include Federal Funds sold under agreements to resell on a gross basis, excluding (1) sales of term Federal Funds, (2) due bills representing purchases of securities or other assets by the reporting bank that have not yet been delivered and similar instruments, (3) resale agreements that mature in more than one business day involving assets other than securities, and (4) yield maintenance dollar repurchase agreements.", "label": "Federal Funds Sold", "terseLabel": "Federal funds sold" } } }, "localname": "FederalFundsSold", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_FederalHomeLoanBankAdvancesDisclosureTextBlock": { "auth_ref": [ "r286", "r626", "r667", "r669" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for borrowing from the Federal Home Loan Bank, including: (i) general description; (ii) title and nature of obligation; (iii) interest rate; (iv) payment terms; (v) maturity dates by year; (vi) collateral requirements; (vii) restrictive covenants; (viii) priority; (ix) conversion or redemption features; (x) carrying value of assets pledged as collateral; (xi) combined aggregate maturities for next five years; (xii) unused or available balances.", "label": "Federal Home Loan Bank Advances Disclosure [Text Block]", "terseLabel": "Federal Home Loan Bank Advances and Other Borrowings" } } }, "localname": "FederalHomeLoanBankAdvancesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowings" ], "xbrltype": "textBlockItemType" }, "us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresInterestRateAtPeriodEnd": { "auth_ref": [ "r667", "r668" ], "lang": { "en-us": { "role": { "documentation": "States the interest rate applicable to Federal Home Loan Bank advances outstanding as of the Balance Sheet date.", "label": "Federal Home Loan Bank Advances General Debt Obligations Disclosures Interest Rate At Period End", "terseLabel": "Interest rate" } } }, "localname": "FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresInterestRateAtPeriodEnd", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "percentItemType" }, "us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable": { "auth_ref": [ "r30", "r625", "r667" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of maximum advances or credit lines available from the Federal Home Loan Bank (FHLB).", "label": "Federal Home Loan Bank Advances General Debt Obligations Disclosures Maximum Amount Available", "terseLabel": "Maximum borrowing limit" } } }, "localname": "FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Federal Home Loan Bank Advances Maturities Summary [Abstract]", "terseLabel": "Contractual Maturities of FHLB Advances [Abstract]" } } }, "localname": "FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsScheduleOfContractualMaturitiesOfFHLBAdvancesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate": { "auth_ref": [ "r286", "r667" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsScheduleOfContractualMaturitiesOfFHLBAdvancesDetails": { "order": 10020.0, "parentTag": "us-gaap_AdvancesFromFederalHomeLoanBanks", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of advance from Federal Home Loan Bank (FHLBank) maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date", "terseLabel": "2024" } } }, "localname": "FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsScheduleOfContractualMaturitiesOfFHLBAdvancesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate": { "auth_ref": [ "r286", "r667" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsScheduleOfContractualMaturitiesOfFHLBAdvancesDetails": { "order": 10010.0, "parentTag": "us-gaap_AdvancesFromFederalHomeLoanBanks", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of advance from Federal Home Loan Bank (FHLBank) maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date", "terseLabel": "2022" } } }, "localname": "FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsScheduleOfContractualMaturitiesOfFHLBAdvancesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FederalHomeLoanBankAdvancesMember": { "auth_ref": [ "r625" ], "lang": { "en-us": { "role": { "documentation": "Borrowings from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and also in times of liquidity shortages. The member institution executes a promissory note, which is generally collateralized by government securities to the Federal Reserve or loans.", "label": "Federal Home Loan Bank Advances [Member]", "terseLabel": "Federal Home Loan Bank Advances [Member]" } } }, "localname": "FederalHomeLoanBankAdvancesMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure": { "auth_ref": [ "r625" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10030.0, "parentTag": "us-gaap_FinancialLiabilitiesFairValueDisclosure", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).", "label": "Federal Home Loan Bank Borrowings Fair Value Disclosure", "terseLabel": "FHLB advances" } } }, "localname": "FederalHomeLoanBankBorrowingsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FederalHomeLoanBanksAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Federal Home Loan Banks [Abstract]" } } }, "localname": "FederalHomeLoanBanksAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_FiduciaryAndTrustMember": { "auth_ref": [ "r306" ], "lang": { "en-us": { "role": { "documentation": "Person or entity with legal duty to act in best interest of client or beneficiary of trust and fiduciary relationship in which one party gives another party right to hold title to asset for benefit of beneficiary.", "label": "Fiduciary And Trust [Member]", "terseLabel": "Trust and Estate Fees [Member]" } } }, "localname": "FiduciaryAndTrustMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "domainItemType" }, "us-gaap_FinanceLoanAndLeaseReceivablesHeldForInvestmentsForeclosedAssetsPolicy": { "auth_ref": [ "r188" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for foreclosed assets or repossessions.", "label": "Finance Loan And Lease Receivables Held For Investments Foreclosed Assets Policy", "terseLabel": "Other Real Estate Owned" } } }, "localname": "FinanceLoanAndLeaseReceivablesHeldForInvestmentsForeclosedAssetsPolicy", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_FinanceLoanAndLeaseReceivablesHeldForSalePolicy": { "auth_ref": [ "r160", "r176", "r180", "r189" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for financing receivables classified as held-for-sale.", "label": "Finance Loan And Lease Receivables Held For Sale Policy", "terseLabel": "Mortgage Loans Held for Sale" } } }, "localname": "FinanceLoanAndLeaseReceivablesHeldForSalePolicy", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_FinanceLoansAndLeasesReceivablePolicy": { "auth_ref": [ "r160", "r171", "r176", "r180", "r185", "r190", "r191", "r192" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for financing receivable.", "label": "Finance Loans And Leases Receivable Policy", "terseLabel": "Loans" } } }, "localname": "FinanceLoansAndLeasesReceivablePolicy", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_FinancialInstrumentAxis": { "auth_ref": [ "r209", "r210", "r243", "r245", "r246", "r249", "r254", "r269", "r271", "r272", "r273", "r570", "r571", "r572", "r573", "r574", "r575", "r576", "r577", "r578", "r581", "r582", "r583", "r584", "r586", "r587", "r588", "r589", "r590", "r591", "r592", "r593", "r594", "r595", "r596", "r597", "r598", "r599", "r600", "r601", "r602" ], "lang": { "en-us": { "role": { "documentation": "Information by type of financial instrument.", "label": "Financial Instrument [Axis]", "terseLabel": "Financial Instrument" } } }, "localname": "FinancialInstrumentAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskScheduleOfContractAmountsRepresentCreditRiskDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Financial Instruments Financial Assets Balance Sheet Groupings [Abstract]", "terseLabel": "Assets [Abstract]" } } }, "localname": "FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinancialLiabilitiesFairValueDisclosure": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.", "label": "Financial Liabilities Fair Value Disclosure", "totalLabel": "Total liabilities at fair value" } } }, "localname": "FinancialLiabilitiesFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancialStandbyLetterOfCreditMember": { "auth_ref": [ "r283", "r285" ], "lang": { "en-us": { "role": { "documentation": "An irrevocable undertaking (typically by a financial institution) to guarantee payment of a specified financial obligation if defined events occur or fail to occur.", "label": "Financial Standby Letter Of Credit [Member]", "terseLabel": "Standby Letter of Credit [Member]" } } }, "localname": "FinancialStandbyLetterOfCreditMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskScheduleOfContractAmountsRepresentCreditRiskDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FinancingReceivableAllowanceForCreditLossAdditionalInformationAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Financing Receivable Allowance For Credit Loss Additional Information [Abstract]", "terseLabel": "Additional Information on Allowance for Loan Losses and Recorded Investment in Loans Receivable [Abstract]" } } }, "localname": "FinancingReceivableAllowanceForCreditLossAdditionalInformationAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment": { "auth_ref": [ "r165" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.", "label": "Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment", "terseLabel": "Ending balances collectively evaluated for impairment" } } }, "localname": "FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1": { "auth_ref": [ "r165" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.", "label": "Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1", "terseLabel": "Ending balances individually evaluated for impairment" } } }, "localname": "FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment": { "auth_ref": [ "r166" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails": { "order": 10020.0, "parentTag": "us-gaap_LoansAndLeasesReceivableGrossCarryingAmount", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The balance of financing receivables that were collectively evaluated for impairment.", "label": "Financing Receivable Collectively Evaluated For Impairment", "terseLabel": "Loans receivable, collectively evaluated for impairment" } } }, "localname": "FinancingReceivableCollectivelyEvaluatedForImpairment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock": { "auth_ref": [ "r177", "r254" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics.", "label": "Financing Receivable Credit Quality Indicators Table [Text Block]", "terseLabel": "Schedule of Loans by Credit Quality Indicators" } } }, "localname": "FinancingReceivableCreditQualityIndicatorsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FinancingReceivableImpairedLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Financing Receivable Impaired [Line Items]", "terseLabel": "Financing Receivable Impaired [Line Items]" } } }, "localname": "FinancingReceivableImpairedLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesSummaryOfModificationClassifiedTroubledDebtRestructuringDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment": { "auth_ref": [ "r166" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails": { "order": 10010.0, "parentTag": "us-gaap_LoansAndLeasesReceivableGrossCarryingAmount", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The balance of financing receivables that were individually evaluated for impairment.", "label": "Financing Receivable Individually Evaluated For Impairment", "terseLabel": "Loans receivable, individually evaluated for impairment" } } }, "localname": "FinancingReceivableIndividuallyEvaluatedForImpairment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancingReceivableModificationsNumberOfContracts2": { "auth_ref": [ "r178" ], "lang": { "en-us": { "role": { "documentation": "Number of financing receivables that have been modified by troubled debt restructurings.", "label": "Financing Receivable Modifications Number Of Contracts2", "terseLabel": "Number of Contracts" } } }, "localname": "FinancingReceivableModificationsNumberOfContracts2", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesSummaryOfModificationClassifiedTroubledDebtRestructuringDetails" ], "xbrltype": "integerItemType" }, "us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2": { "auth_ref": [ "r178" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after troubled debt restructuring, of modified financing receivable.", "label": "Financing Receivable Modifications Post Modification Recorded Investment2", "verboseLabel": "Post-Modification Outstanding Recorded Investment" } } }, "localname": "FinancingReceivableModificationsPostModificationRecordedInvestment2", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesSummaryOfModificationClassifiedTroubledDebtRestructuringDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2": { "auth_ref": [ "r178" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, before troubled debt restructuring, of financing receivable to be modified.", "label": "Financing Receivable Modifications Pre Modification Recorded Investment2", "terseLabel": "Pre-Modification Outstanding Recorded Investment" } } }, "localname": "FinancingReceivableModificationsPreModificationRecordedInvestment2", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesSummaryOfModificationClassifiedTroubledDebtRestructuringDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancingReceivableModificationsRecordedInvestment": { "auth_ref": [ "r178", "r194" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of financing receivable modified as troubled debt restructuring.", "label": "Financing Receivable Modifications Recorded Investment", "terseLabel": "TDR loans in the portfolio" } } }, "localname": "FinancingReceivableModificationsRecordedInvestment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1": { "auth_ref": [ "r179" ], "lang": { "en-us": { "role": { "documentation": "Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.", "label": "Financing Receivable Modifications Subsequent Default Number Of Contracts1", "terseLabel": "Number of TDRs with payment defaults occurring within 12 months of modification" } } }, "localname": "FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "integerItemType" }, "us-gaap_FinancingReceivablePortfolioSegmentAxis": { "auth_ref": [ "r243", "r245", "r255" ], "lang": { "en-us": { "role": { "documentation": "Information by the level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses.", "label": "Financing Receivable Portfolio Segment [Axis]", "terseLabel": "Financing Receivable Portfolio Segment" } } }, "localname": "FinancingReceivablePortfolioSegmentAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesSummaryOfModificationClassifiedTroubledDebtRestructuringDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinancingReceivablePortfolioSegmentDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Level at which an entity develops and documents a systematic methodology to determine its allowance for credit losses.", "label": "Financing Receivable Portfolio Segment [Domain]", "terseLabel": "Financing Receivable Portfolio Segment" } } }, "localname": "FinancingReceivablePortfolioSegmentDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesSummaryOfModificationClassifiedTroubledDebtRestructuringDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing": { "auth_ref": [ "r182", "r248", "r258" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of financing receivable 90 days or more past due and still accruing.", "label": "Financing Receivable Recorded Investment90 Days Past Due And Still Accruing", "terseLabel": "90+ days past due and accruing" } } }, "localname": "FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Financing Receivable Recorded Investment Aging [Abstract]", "terseLabel": "Financing Receivable, Recorded Investment, Aging [Abstract]" } } }, "localname": "FinancingReceivableRecordedInvestmentAgingAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinancingReceivableRecordedInvestmentCurrent": { "auth_ref": [ "r184", "r246", "r258" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails": { "order": 10020.0, "parentTag": "us-gaap_LoansAndLeasesReceivableGrossCarryingAmount", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of financing receivable not past due.", "label": "Financing Receivable Recorded Investment Current", "terseLabel": "Current" } } }, "localname": "FinancingReceivableRecordedInvestmentCurrent", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancingReceivableRecordedInvestmentLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Financing Receivable Recorded Investment [Line Items]", "terseLabel": "Financing Receivable Recorded Investment [Line Items]" } } }, "localname": "FinancingReceivableRecordedInvestmentLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus": { "auth_ref": [ "r181", "r247" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of financing receivable on nonaccrual status.", "label": "Financing Receivable Recorded Investment Nonaccrual Status", "terseLabel": "Nonaccruals" } } }, "localname": "FinancingReceivableRecordedInvestmentNonaccrualStatus", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancingReceivableRecordedInvestmentPastDue": { "auth_ref": [ "r184", "r246", "r258" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails": { "order": 10010.0, "parentTag": "us-gaap_LoansAndLeasesReceivableGrossCarryingAmount", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of financing receivable past due.", "label": "Financing Receivable Recorded Investment Past Due", "terseLabel": "Past due" } } }, "localname": "FinancingReceivableRecordedInvestmentPastDue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Financing Receivable Recorded Investment Past Due [Line Items]", "terseLabel": "Financing Receivable Recorded Investment Past Due [Line Items]" } } }, "localname": "FinancingReceivableRecordedInvestmentPastDueLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinancingReceivables30To59DaysPastDueMember": { "auth_ref": [ "r258" ], "lang": { "en-us": { "role": { "documentation": "Financial asset more than 29 days past due but fewer than 60 days past due.", "label": "Financing Receivables30 To59 Days Past Due [Member]", "terseLabel": "30-59 Days Past Due [Member]" } } }, "localname": "FinancingReceivables30To59DaysPastDueMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FinancingReceivables60To89DaysPastDueMember": { "auth_ref": [ "r258" ], "lang": { "en-us": { "role": { "documentation": "Financial asset more than 59 days past due but fewer than 90 days past due.", "label": "Financing Receivables60 To89 Days Past Due [Member]", "terseLabel": "60-89 Days Past Due [Member]" } } }, "localname": "FinancingReceivables60To89DaysPastDueMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember": { "auth_ref": [ "r258" ], "lang": { "en-us": { "role": { "documentation": "Financial asset equal to or greater than 90 days past due.", "label": "Financing Receivables Equal To Greater Than90 Days Past Due [Member]", "terseLabel": "90 Days Past Due [Member]", "verboseLabel": "90+ Days Past Due [Member]" } } }, "localname": "FinancingReceivablesEqualToGreaterThan90DaysPastDueMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_FinancingReceivablesPeriodPastDueAxis": { "auth_ref": [ "r246", "r258" ], "lang": { "en-us": { "role": { "documentation": "Information by time period financial asset is past due.", "label": "Financing Receivables Period Past Due [Axis]", "terseLabel": "Financial Asset, Period Past Due" } } }, "localname": "FinancingReceivablesPeriodPastDueAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FinancingReceivablesPeriodPastDueDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Period in which financial asset is past due. Element name and standard label in Financial Asset, [numeric lower end] to [numeric higher end] [date measure] Past Due [Member] or Financial Asset, Greater Than [low end numeric value] [date measure] Past Due [Member] or Financial Asset, Less Than [high end numeric value] [date measure] Past Due [Member] formats.", "label": "Financing Receivables Period Past Due [Domain]", "terseLabel": "Financial Asset, Period Past Due" } } }, "localname": "FinancingReceivablesPeriodPastDueDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_GainLossOnSaleOfDerivatives": { "auth_ref": [ "r87", "r645" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10190.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.", "label": "Gain Loss On Sale Of Derivatives", "negatedLabel": "(Gain) loss on interest rate swaps, net" } } }, "localname": "GainLossOnSaleOfDerivatives", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_GainLossOnSaleOfMortgageLoans": { "auth_ref": [ "r87", "r697", "r698", "r699" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10280.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10220.0, "parentTag": "us-gaap_NoninterestIncome", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.", "label": "Gain Loss On Sale Of Mortgage Loans", "negatedLabel": "Gain on mortgage loans held for sale", "terseLabel": "Gain on sale of mortgage loans held for sale, net" } } }, "localname": "GainLossOnSaleOfMortgageLoans", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_GainLossOnSaleOfPropertyPlantEquipment": { "auth_ref": [ "r87" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10180.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.", "label": "Gain Loss On Sale Of Property Plant Equipment", "negatedLabel": "Loss on disposal of premises and equipment, net" } } }, "localname": "GainLossOnSaleOfPropertyPlantEquipment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_GeneralDiscussionOfPensionAndOtherPostretirementBenefitsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "General Discussion Of Pension And Other Postretirement Benefits [Abstract]", "terseLabel": "401(k) Plan [Abstract]" } } }, "localname": "GeneralDiscussionOfPensionAndOtherPostretirementBenefitsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_HedgingRelationshipDomain": { "auth_ref": [ "r490" ], "lang": { "en-us": { "role": { "documentation": "Nature or intent of a hedge.", "label": "Hedging Relationship [Domain]", "terseLabel": "Hedging Relationship" } } }, "localname": "HedgingRelationshipDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_HomeEquityMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Revolving, open-end loan extended under a line of credit and secured by the borrower's residential property.", "label": "Home Equity [Member]", "terseLabel": "Home Equity Lines of Credit [Member]" } } }, "localname": "HomeEquityMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment": { "auth_ref": [ "r172", "r175" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.", "label": "Impaired Financing Receivable Average Recorded Investment", "terseLabel": "Average recorded investment, total" } } }, "localname": "ImpairedFinancingReceivableAverageRecordedInvestment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableAverageRecordedInvestmentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Impaired Financing Receivable Average Recorded Investment [Abstract]", "terseLabel": "Average Recorded Investment [Abstract]" } } }, "localname": "ImpairedFinancingReceivableAverageRecordedInvestmentAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod": { "auth_ref": [ "r173" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.", "label": "Impaired Financing Receivable Interest Income Accrual Method", "terseLabel": "Interest income recognized, total" } } }, "localname": "ImpairedFinancingReceivableInterestIncomeAccrualMethod", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethodAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Impaired Financing Receivable Interest Income Accrual Method [Abstract]", "terseLabel": "Interest Income Recognized [Abstract]" } } }, "localname": "ImpairedFinancingReceivableInterestIncomeAccrualMethodAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ImpairedFinancingReceivableRecordedInvestment": { "auth_ref": [ "r168" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.", "label": "Impaired Financing Receivable Recorded Investment", "terseLabel": "Recorded investment, total" } } }, "localname": "ImpairedFinancingReceivableRecordedInvestment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableRecordedInvestmentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Impaired Financing Receivable Recorded Investment [Abstract]", "terseLabel": "Recorded Investment [Abstract]" } } }, "localname": "ImpairedFinancingReceivableRecordedInvestmentAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ImpairedFinancingReceivableRelatedAllowance": { "auth_ref": [ "r169" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of allowance for credit losses related to recorded investment.", "label": "Impaired Financing Receivable Related Allowance", "terseLabel": "Related allowance" } } }, "localname": "ImpairedFinancingReceivableRelatedAllowance", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance": { "auth_ref": [ "r170" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.", "label": "Impaired Financing Receivable Unpaid Principal Balance", "terseLabel": "Unpaid principal balance, total" } } }, "localname": "ImpairedFinancingReceivableUnpaidPrincipalBalance", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalanceAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Impaired Financing Receivable Unpaid Principal Balance [Abstract]", "terseLabel": "Unpaid Principal Balance [Abstract]" } } }, "localname": "ImpairedFinancingReceivableUnpaidPrincipalBalanceAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment": { "auth_ref": [ "r172", "r175" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.", "label": "Impaired Financing Receivable With No Related Allowance Average Recorded Investment", "terseLabel": "Average recorded investment, with no specific allowance recorded" } } }, "localname": "ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod": { "auth_ref": [ "r173" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.", "label": "Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method", "terseLabel": "Interest income recognized, with no specific allowance recorded" } } }, "localname": "ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment": { "auth_ref": [ "r168" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.", "label": "Impaired Financing Receivable With No Related Allowance Recorded Investment", "terseLabel": "Recorded investment, with no specific allowance recorded" } } }, "localname": "ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance": { "auth_ref": [ "r170" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.", "label": "Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance", "terseLabel": "Unpaid principal balance, with no specific allowance recorded" } } }, "localname": "ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment": { "auth_ref": [ "r172", "r175" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.", "label": "Impaired Financing Receivable With Related Allowance Average Recorded Investment", "terseLabel": "Average recorded investment, with an allowance recorded" } } }, "localname": "ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod": { "auth_ref": [ "r173" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.", "label": "Impaired Financing Receivable With Related Allowance Interest Income Accrual Method", "terseLabel": "Interest income recognized, with an allowance recorded" } } }, "localname": "ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment": { "auth_ref": [ "r168" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.", "label": "Impaired Financing Receivable With Related Allowance Recorded Investment", "terseLabel": "Recorded investment, with an allowance recorded" } } }, "localname": "ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance": { "auth_ref": [ "r170" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.", "label": "Impaired Financing Receivable With Related Allowance Unpaid Principal Balance", "terseLabel": "Unpaid principal balance, with an allowance recorded" } } }, "localname": "ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ImpairedFinancingReceivablesTableTextBlock": { "auth_ref": [ "r174" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of impaired financing receivables.", "label": "Impaired Financing Receivables Table [Text Block]", "terseLabel": "Schedule of Impaired Loans by Portfolio Segment" } } }, "localname": "ImpairedFinancingReceivablesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ImpairmentOfInvestments": { "auth_ref": [ "r197" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.", "label": "Impairment Of Investments", "terseLabel": "Other-than-temporary impairment in securities" } } }, "localname": "ImpairmentOfInvestments", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromAffordableHousingProjectsEquityMethodInvestments": { "auth_ref": [ "r228" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of investment income (loss) of qualified affordable housing project investments accounted for using the equity method.", "label": "Income Loss From Affordable Housing Projects Equity Method Investments", "terseLabel": "Losses from investments in affordable housing projects" } } }, "localname": "IncomeLossFromAffordableHousingProjectsEquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments": { "auth_ref": [ "r98", "r144", "r146", "r149", "r152", "r154" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10030.0, "parentTag": "fbss_IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10010.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.", "label": "Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments", "totalLabel": "Income before income taxes" } } }, "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromEquityMethodInvestments": { "auth_ref": [ "r62", "r87", "r142", "r223", "r633", "r690" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails": { "order": 10020.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10020.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of income (loss) for proportionate share of equity method investee's income (loss).", "label": "Income Loss From Equity Method Investments", "negatedLabel": "Undistributed earnings of subsidiaries", "terseLabel": "Equity in undistributed net income of subsidiaries" } } }, "localname": "IncomeLossFromEquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeStatementAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Income Statement [Abstract]" } } }, "localname": "IncomeStatementAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Income Tax Disclosure [Abstract]" } } }, "localname": "IncomeTaxDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureTextBlock": { "auth_ref": [ "r434", "r435", "r441", "r452", "r457", "r461", "r462", "r463" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.", "label": "Income Tax Disclosure [Text Block]", "terseLabel": "Income Taxes" } } }, "localname": "IncomeTaxDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxes" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxExpenseBenefit": { "auth_ref": [ "r94", "r117", "r118", "r143", "r432", "r453", "r459", "r696" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10040.0, "parentTag": "fbss_IncomeLossBeforeEquityInUndistributedEarningsOfSubsidiaries", "weight": -1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10020.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.", "label": "Income Tax Expense Benefit", "terseLabel": "Income tax expense", "totalLabel": "Provision for income taxes", "verboseLabel": "Income tax benefit" } } }, "localname": "IncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Income Tax Expense Benefit Continuing Operations [Abstract]", "terseLabel": "Allocation of Federal Income Taxes Between Current and Deferred [Abstract]" } } }, "localname": "IncomeTaxExpenseBenefitContinuingOperationsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesComponentsOfIncomeTaxExpenseDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]", "terseLabel": "Reconciliation of Statutory to Effective Tax Rates [Abstract]" } } }, "localname": "IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxPolicyTextBlock": { "auth_ref": [ "r58", "r91", "r430", "r431", "r435", "r436", "r440", "r446", "r740" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.", "label": "Income Tax Policy [Text Block]", "terseLabel": "Income Taxes" } } }, "localname": "IncomeTaxPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r433" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails": { "order": 10010.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.", "label": "Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate", "terseLabel": "Computed \u201cexpected\u201d tax expense" } } }, "localname": "IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationOtherAdjustments": { "auth_ref": [ "r433" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails": { "order": 10040.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.", "label": "Income Tax Reconciliation Other Adjustments", "terseLabel": "Other" } } }, "localname": "IncomeTaxReconciliationOtherAdjustments", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationOtherReconcilingItemsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Income Tax Reconciliation Other Reconciling Items [Abstract]", "terseLabel": "Changes in income taxes resulting from:" } } }, "localname": "IncomeTaxReconciliationOtherReconcilingItemsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxReconciliationTaxCreditsOther": { "auth_ref": [ "r433" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails": { "order": 10030.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other tax credits.", "label": "Income Tax Reconciliation Tax Credits Other", "negatedLabel": "Tax credits" } } }, "localname": "IncomeTaxReconciliationTaxCreditsOther", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationTaxExemptIncome": { "auth_ref": [ "r433" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails": { "order": 10020.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes.", "label": "Income Tax Reconciliation Tax Exempt Income", "negatedLabel": "Tax-exempt interest income" } } }, "localname": "IncomeTaxReconciliationTaxExemptIncome", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesReconciliationOfFederalStatutoryTaxRateDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxesPaidNet": { "auth_ref": [ "r90" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.", "label": "Income Taxes Paid Net", "terseLabel": "Income taxes" } } }, "localname": "IncomeTaxesPaidNet", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Increase Decrease In Operating Capital [Abstract]", "terseLabel": "Changes in assets and liabilities:" } } }, "localname": "IncreaseDecreaseInOperatingCapitalAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_IncreaseDecreaseInOtherOperatingAssets": { "auth_ref": [ "r86" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails": { "order": 10050.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10290.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in operating assets classified as other.", "label": "Increase Decrease In Other Operating Assets", "negatedLabel": "(Increase) decrease in other assets" } } }, "localname": "IncreaseDecreaseInOtherOperatingAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOtherOperatingLiabilities": { "auth_ref": [ "r86" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails": { "order": 10060.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10300.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of increase (decrease) in operating liabilities classified as other.", "label": "Increase Decrease In Other Operating Liabilities", "terseLabel": "Increase (decrease) in other liabilities", "verboseLabel": "Increase in other liabilities" } } }, "localname": "IncreaseDecreaseInOtherOperatingLiabilities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInTimeDeposits": { "auth_ref": [ "r654" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10050.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Net cash inflow (outflow) of time deposits.", "label": "Increase Decrease In Time Deposits", "terseLabel": "Increase (decrease) in time deposits" } } }, "localname": "IncreaseDecreaseInTimeDeposits", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements": { "auth_ref": [ "r123", "r124", "r125", "r129" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareWeightedAverageNumberOfSharesUsedInComputingEarningsPerShareDetails": { "order": 10020.0, "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.", "label": "Incremental Common Shares Attributable To Share Based Payment Arrangements", "terseLabel": "Effect of dilutive stock awards (in shares)" } } }, "localname": "IncrementalCommonSharesAttributableToShareBasedPaymentArrangements", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareWeightedAverageNumberOfSharesUsedInComputingEarningsPerShareDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_InformationTechnologyAndDataProcessing": { "auth_ref": [ "r70" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10110.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of expenses incurred in the period for information technology and data processing products and services.", "label": "Information Technology And Data Processing", "terseLabel": "Data processing" } } }, "localname": "InformationTechnologyAndDataProcessing", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestAndDividendIncomeOperating": { "auth_ref": [ "r640" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10050.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10260.0, "parentTag": "us-gaap_InterestIncomeExpenseNet", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein.", "label": "Interest And Dividend Income Operating", "totalLabel": "Total interest income" } } }, "localname": "InterestAndDividendIncomeOperating", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestAndDividendIncomeOperatingAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Interest And Dividend Income Operating [Abstract]", "terseLabel": "Interest Income", "verboseLabel": "Income" } } }, "localname": "InterestAndDividendIncomeOperatingAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "stringItemType" }, "us-gaap_InterestAndDividendIncomeSecuritiesByTaxableStatusAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Interest And Dividend Income Securities By Taxable Status [Abstract]", "terseLabel": "Interest and dividends on securities:" } } }, "localname": "InterestAndDividendIncomeSecuritiesByTaxableStatusAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "stringItemType" }, "us-gaap_InterestAndFeeIncomeLoansAndLeases": { "auth_ref": [ "r639" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10110.0, "parentTag": "us-gaap_InterestAndDividendIncomeOperating", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10320.0, "parentTag": "us-gaap_InterestAndDividendIncomeOperating", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.", "label": "Interest And Fee Income Loans And Leases", "terseLabel": "Interest and fees on loans", "verboseLabel": "Interest income" } } }, "localname": "InterestAndFeeIncomeLoansAndLeases", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestBearingDepositLiabilities": { "auth_ref": [ "r623" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10110.0, "parentTag": "us-gaap_Deposits", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The aggregate of all domestic and foreign interest-bearing deposit liabilities.", "label": "Interest Bearing Deposit Liabilities", "totalLabel": "Total interest-bearing" } } }, "localname": "InterestBearingDepositLiabilities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestBearingDepositLiabilitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Interest Bearing Deposit Liabilities [Abstract]", "terseLabel": "Interest-bearing:" } } }, "localname": "InterestBearingDepositLiabilitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_InterestBearingDepositsInBanks": { "auth_ref": [ "r610", "r629" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails": { "order": 10020.0, "parentTag": "us-gaap_Assets", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10160.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet.", "label": "Interest Bearing Deposits In Banks", "terseLabel": "Interest-bearing deposits in other banks" } } }, "localname": "InterestBearingDepositsInBanks", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestExpense": { "auth_ref": [ "r61", "r141", "r540", "r543", "r653" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10070.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10270.0, "parentTag": "us-gaap_InterestIncomeExpenseNet", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of the cost of borrowed funds accounted for as interest expense.", "label": "Interest Expense", "terseLabel": "Interest expense", "totalLabel": "Total interest expense" } } }, "localname": "InterestExpense", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestExpenseAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Interest Expense [Abstract]", "terseLabel": "Interest Expense" } } }, "localname": "InterestExpenseAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "stringItemType" }, "us-gaap_InterestExpenseDomesticDeposits": { "auth_ref": [ "r651" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10280.0, "parentTag": "us-gaap_InterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The aggregate interest expense incurred on all domestic deposits.", "label": "Interest Expense Domestic Deposits", "terseLabel": "Interest on deposits" } } }, "localname": "InterestExpenseDomesticDeposits", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestExpenseFederalFundsPurchased": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10290.0, "parentTag": "us-gaap_InterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Gross expenses on the purchase of Federal funds at a specified price with a simultaneous agreement to sell the same to the same counterparty at a fixed or determinable price at a future date.", "label": "Interest Expense Federal Funds Purchased", "terseLabel": "Interest on federal funds purchased" } } }, "localname": "InterestExpenseFederalFundsPurchased", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10300.0, "parentTag": "us-gaap_InterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Interest expense incurred during the reporting period on long-term borrowings associated with Federal Home Loan Bank and Federal Reserve Bank advances.", "label": "Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term", "terseLabel": "Interest on Federal Home Loan Bank advances" } } }, "localname": "InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestExpenseJuniorSubordinatedDebentures": { "auth_ref": [ "r652" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10310.0, "parentTag": "us-gaap_InterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Interest expense incurred during the reporting period on junior subordinated debentures. Includes amortization of expenses incurred in the issuance of subordinated notes and debentures.", "label": "Interest Expense Junior Subordinated Debentures", "terseLabel": "Interest on Junior subordinated debt", "verboseLabel": "Interest expense" } } }, "localname": "InterestExpenseJuniorSubordinatedDebentures", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestIncomeDepositsWithFinancialInstitutions": { "auth_ref": [ "r650" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10360.0, "parentTag": "us-gaap_InterestAndDividendIncomeOperating", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Interest income derived from funds deposited with both domestic and foreign financial institutions including funds in money market and other accounts.", "label": "Interest Income Deposits With Financial Institutions", "terseLabel": "Interest on deposits in other banks" } } }, "localname": "InterestIncomeDepositsWithFinancialInstitutions", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss": { "auth_ref": [ "r643" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10030.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of interest income or expense, including any amortization and accretion (as applicable) of discounts and premiums, including consideration of the provisions for loan, lease, credit, and other related losses.", "label": "Interest Income Expense After Provision For Loan Loss", "totalLabel": "Net interest income after provision for loan losses" } } }, "localname": "InterestIncomeExpenseAfterProvisionForLoanLoss", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestIncomeExpenseNet": { "auth_ref": [ "r641" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10240.0, "parentTag": "us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The net amount of operating interest income (expense).", "label": "Interest Income Expense Net", "totalLabel": "Net interest income" } } }, "localname": "InterestIncomeExpenseNet", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestIncomeSecuritiesTaxExempt": { "auth_ref": [ "r649" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10340.0, "parentTag": "us-gaap_InterestAndDividendIncomeOperating", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of operating interest income, including amortization and accretion of premiums and discounts, on securities exempt from state, federal and other income tax.", "label": "Interest Income Securities Tax Exempt", "terseLabel": "Tax-exempt interest" } } }, "localname": "InterestIncomeSecuritiesTaxExempt", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestIncomeSecuritiesTaxable": { "auth_ref": [ "r649" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10330.0, "parentTag": "us-gaap_InterestAndDividendIncomeOperating", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of operating interest income, including amortization and accretion of premiums and discounts, on securities subject to state, federal and other income tax.", "label": "Interest Income Securities Taxable", "terseLabel": "Taxable interest income" } } }, "localname": "InterestIncomeSecuritiesTaxable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestPaidNet": { "auth_ref": [ "r78", "r83", "r90" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.", "label": "Interest Paid Net", "terseLabel": "Interest" } } }, "localname": "InterestPaidNet", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestRateDerivativesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Interest Rate Derivatives [Abstract]", "terseLabel": "Derivative Instruments and Hedging Activities [Abstract]" } } }, "localname": "InterestRateDerivativesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_InterestRateSwapMember": { "auth_ref": [ "r500" ], "lang": { "en-us": { "role": { "documentation": "Forward based contracts in which two parties agree to swap periodic payments that are fixed at the outset of the swap contract with variable payments based on a market interest rate (index rate) over a specified period.", "label": "Interest Rate Swap [Member]", "terseLabel": "Interest Rate Swap [Member]" } } }, "localname": "InterestRateSwapMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_InterestReceivable": { "auth_ref": [ "r33" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10230.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.", "label": "Interest Receivable", "terseLabel": "Accrued interest receivable" } } }, "localname": "InterestReceivable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_InternalCreditAssessmentAxis": { "auth_ref": [ "r177", "r254", "r256", "r257", "r284", "r502" ], "lang": { "en-us": { "role": { "documentation": "Information by entity-defined rating.", "label": "Internal Credit Assessment [Axis]", "terseLabel": "Internal Credit Assessment" } } }, "localname": "InternalCreditAssessmentAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_InternalCreditAssessmentDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Entity defined credit risk rating.", "label": "Internal Credit Assessment [Domain]", "terseLabel": "Internal Credit Assessment" } } }, "localname": "InternalCreditAssessmentDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_InvestmentIncomeDividend": { "auth_ref": [ "r71" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10120.0, "parentTag": "us-gaap_InterestAndDividendIncomeOperating", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of dividend income on nonoperating securities.", "label": "Investment Income Dividend", "terseLabel": "Dividends from subsidiaries" } } }, "localname": "InvestmentIncomeDividend", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentTypeAxis": { "auth_ref": [ "r720", "r721", "r722", "r723", "r724", "r725", "r726", "r727", "r728", "r730", "r731", "r732", "r733", "r734", "r735" ], "lang": { "en-us": { "role": { "documentation": "Information by type of investments.", "label": "Investment Type [Axis]", "terseLabel": "Investment Type" } } }, "localname": "InvestmentTypeAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_InvestmentTypeCategorizationMember": { "auth_ref": [ "r720", "r721", "r722", "r723", "r724", "r725", "r726", "r727", "r728", "r730", "r731", "r732", "r733", "r734", "r735" ], "lang": { "en-us": { "role": { "documentation": "Asset obtained to generate income or appreciate in value.", "label": "Investment Type Categorization [Member]", "terseLabel": "Investments" } } }, "localname": "InvestmentTypeCategorizationMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.", "label": "Investments Classified By Contractual Maturity Date Table [Text Block]", "terseLabel": "Summary of Amortized Cost and Fair Value of Securities Available for Sale, by Contractual Maturity" } } }, "localname": "InvestmentsClassifiedByContractualMaturityDateTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Investments Debt And Equity Securities [Abstract]" } } }, "localname": "InvestmentsDebtAndEquitySecuritiesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_InvestmentsFairValueDisclosure": { "auth_ref": [ "r512" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10070.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.", "label": "Investments Fair Value Disclosure", "terseLabel": "Mutual funds", "verboseLabel": "Mutual funds" } } }, "localname": "InvestmentsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures": { "auth_ref": [ "r20" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails": { "order": 10030.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of investment in equity method investee and investment in and advance to affiliate.", "label": "Investments In Affiliates Subsidiaries Associates And Joint Ventures", "terseLabel": "Investment in subsidiaries" } } }, "localname": "InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock": { "auth_ref": [ "r221", "r609", "r664", "r736" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for investments in certain debt and equity securities.", "label": "Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure [Text Block]", "terseLabel": "Securities" } } }, "localname": "InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecurities" ], "xbrltype": "textBlockItemType" }, "us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims": { "auth_ref": [ "r87" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails": { "order": 10030.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10240.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value of share-based compensation granted to nonemployees as payment for services rendered or acknowledged claims.", "label": "Issuance Of Stock And Warrants For Services Or Claims", "terseLabel": "Issuance of vested restricted stock" } } }, "localname": "IssuanceOfStockAndWarrantsForServicesOrClaims", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_JuniorSubordinatedLongtermNotesCurrentAndNoncurrentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Junior Subordinated Longterm Notes Current And Noncurrent [Abstract]", "terseLabel": "Junior Subordinated Notes [Abstract]" } } }, "localname": "JuniorSubordinatedLongtermNotesCurrentAndNoncurrentAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_JuniorSubordinatedNotes": { "auth_ref": [ "r9", "r617", "r682" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10080.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments.", "label": "Junior Subordinated Notes", "terseLabel": "Junior subordinated debt" } } }, "localname": "JuniorSubordinatedNotes", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LaborAndRelatedExpense": { "auth_ref": [ "r68" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10060.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit.", "label": "Labor And Related Expense", "terseLabel": "Salaries and benefits" } } }, "localname": "LaborAndRelatedExpense", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_LandMember": { "auth_ref": [ "r306" ], "lang": { "en-us": { "role": { "documentation": "Part of earth's surface not covered by water.", "label": "Land [Member]", "terseLabel": "Land [Member]" } } }, "localname": "LandMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_LeaseCost": { "auth_ref": [ "r557", "r559" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of lease cost recognized by lessee for lease contract.", "label": "Lease Cost", "totalLabel": "Total lease expense" } } }, "localname": "LeaseCost", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LeaseCostAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Lease Cost [Abstract]", "terseLabel": "Lease Expense" } } }, "localname": "LeaseCostAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LeaseCostTableTextBlock": { "auth_ref": [ "r557" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income.", "label": "Lease Cost Table [Text Block]", "terseLabel": "Schedule of Information about Leases" } } }, "localname": "LeaseCostTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_LeaseholdImprovementsMember": { "auth_ref": [ "r275" ], "lang": { "en-us": { "role": { "documentation": "Additions or improvements to assets held under a lease arrangement.", "label": "Leasehold Improvements [Member]", "terseLabel": "Leasehold Improvements [Member]" } } }, "localname": "LeaseholdImprovementsMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_LeasesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Leases [Abstract]" } } }, "localname": "LeasesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_LegalFees": { "auth_ref": [ "r69" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10080.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.", "label": "Legal Fees", "terseLabel": "Legal and professional fees" } } }, "localname": "LegalFees", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeLeasesPolicyTextBlock": { "auth_ref": [ "r551" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for leasing arrangement entered into by lessee.", "label": "Lessee Leases Policy [Text Block]", "terseLabel": "Leases" } } }, "localname": "LesseeLeasesPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock": { "auth_ref": [ "r558" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.", "label": "Lessee Operating Lease Liability Maturity Table [Text Block]", "terseLabel": "Maturities of Lease Liabilities" } } }, "localname": "LesseeOperatingLeaseLiabilityMaturityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue": { "auth_ref": [ "r558" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails2": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease.", "label": "Lessee Operating Lease Liability Payments Due", "totalLabel": "Total undiscounted cash flows" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive": { "auth_ref": [ "r558" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails": { "order": 10060.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Lessee Operating Lease Liability Payments Due After Year Five", "terseLabel": "Thereafter" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths": { "auth_ref": [ "r558" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails": { "order": 10010.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Lessee Operating Lease Liability Payments Due Next Twelve Months", "terseLabel": "2021" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive": { "auth_ref": [ "r558" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails": { "order": 10050.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Lessee Operating Lease Liability Payments Due Year Five", "terseLabel": "2025" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFive", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour": { "auth_ref": [ "r558" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails": { "order": 10040.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Lessee Operating Lease Liability Payments Due Year Four", "terseLabel": "2024" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearFour", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree": { "auth_ref": [ "r558" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails": { "order": 10030.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Lessee Operating Lease Liability Payments Due Year Three", "terseLabel": "2023" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearThree", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo": { "auth_ref": [ "r558" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails": { "order": 10020.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Lessee Operating Lease Liability Payments Due Year Two", "terseLabel": "2022" } } }, "localname": "LesseeOperatingLeaseLiabilityPaymentsDueYearTwo", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount": { "auth_ref": [ "r558" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails2": { "order": 10010.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.", "label": "Lessee Operating Lease Liability Undiscounted Excess Amount", "negatedLabel": "Less: Discount" } } }, "localname": "LesseeOperatingLeaseLiabilityUndiscountedExcessAmount", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LesseeOperatingLeasesTextBlock": { "auth_ref": [ "r560" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability.", "label": "Lessee Operating Leases [Text Block]", "terseLabel": "Leases" } } }, "localname": "LesseeOperatingLeasesTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeases" ], "xbrltype": "textBlockItemType" }, "us-gaap_LetterOfCreditMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "A document typically issued by a financial institution which acts as a guarantee of payment to a beneficiary, or as the source of payment for a specific transaction (for example, wiring funds to a foreign exporter if and when specified merchandise is accepted pursuant to the terms of the letter of credit).", "label": "Letter Of Credit [Member]", "terseLabel": "Letter of Credit [Member]" } } }, "localname": "LetterOfCreditMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_Liabilities": { "auth_ref": [ "r28", "r93", "r148", "r225", "r474", "r479", "r480", "r530" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10010.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.", "label": "Liabilities", "totalLabel": "Total liabilities" } } }, "localname": "Liabilities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Liabilities [Abstract]", "terseLabel": "Liabilities" } } }, "localname": "LiabilitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesAndStockholdersEquity": { "auth_ref": [ "r19", "r93", "r225", "r530", "r618", "r688" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.", "label": "Liabilities And Stockholders Equity", "totalLabel": "Total liabilities and shareholders\u2019 equity" } } }, "localname": "LiabilitiesAndStockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAndStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Liabilities And Stockholders Equity [Abstract]", "terseLabel": "Liabilities and Shareholders' Equity" } } }, "localname": "LiabilitiesAndStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesFairValueDisclosureAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Liabilities Fair Value Disclosure [Abstract]", "terseLabel": "Liabilities [Abstract]" } } }, "localname": "LiabilitiesFairValueDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilityForUncertainTaxPositionsCurrent": { "auth_ref": [ "r29" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount recognized for uncertainty in income taxes classified as current.", "label": "Liability For Uncertain Tax Positions Current", "terseLabel": "Uncertain tax positions" } } }, "localname": "LiabilityForUncertainTaxPositionsCurrent", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity": { "auth_ref": [ "r26" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.", "label": "Line Of Credit Facility Current Borrowing Capacity", "terseLabel": "Available federal funds lines of credit" } } }, "localname": "LineOfCreditFacilityCurrentBorrowingCapacity", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LineOfCreditFacilityLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Line Of Credit Facility [Line Items]", "terseLabel": "Line of Credit Facility [Line Items]" } } }, "localname": "LineOfCreditFacilityLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LineOfCreditFacilityTable": { "auth_ref": [ "r26", "r97" ], "lang": { "en-us": { "role": { "documentation": "A table or schedule providing information pertaining to short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line.", "label": "Line Of Credit Facility [Table]", "terseLabel": "Line Of Credit Facility [Table]" } } }, "localname": "LineOfCreditFacilityTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LoansAndLeasesReceivableAllowance": { "auth_ref": [ "r161", "r165", "r187", "r193" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10280.0, "parentTag": "us-gaap_LoansAndLeasesReceivableNetReportedAmount", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.", "label": "Loans And Leases Receivable Allowance", "negatedLabel": "Allowance for loan losses", "periodEndLabel": "Ending balance", "periodStartLabel": "Beginning balance" } } }, "localname": "LoansAndLeasesReceivableAllowance", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LoansAndLeasesReceivableDisclosureLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Loans And Leases Receivable Disclosure [Line Items]", "terseLabel": "Loans And Leases Receivable Disclosure [Line Items]" } } }, "localname": "LoansAndLeasesReceivableDisclosureLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LoansAndLeasesReceivableDisclosureTable": { "auth_ref": [ "r159" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about loans and leases receivable.", "label": "Loans And Leases Receivable Disclosure [Table]", "terseLabel": "Loans And Leases Receivable Disclosure [Table]" } } }, "localname": "LoansAndLeasesReceivableDisclosureTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LoansAndLeasesReceivableGrossCarryingAmount": { "auth_ref": [ "r159" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10270.0, "parentTag": "us-gaap_LoansAndLeasesReceivableNetReportedAmount", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.", "label": "Loans And Leases Receivable Gross Carrying Amount", "terseLabel": "Loans", "totalLabel": "Total Loans" } } }, "localname": "LoansAndLeasesReceivableGrossCarryingAmount", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LoansAndLeasesReceivableNetReportedAmount": { "auth_ref": [ "r159", "r632" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10210.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.", "label": "Loans And Leases Receivable Net Reported Amount", "totalLabel": "Loans, net" } } }, "localname": "LoansAndLeasesReceivableNetReportedAmount", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LoansAndLeasesReceivableRelatedParties": { "auth_ref": [ "r564", "r631" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.", "label": "Loans And Leases Receivable Related Parties", "terseLabel": "Loans to related Parties" } } }, "localname": "LoansAndLeasesReceivableRelatedParties", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions": { "auth_ref": [ "r564", "r631" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Reflects the amount of new advances made to related parties in the form of loan and lease receivables.", "label": "Loans And Leases Receivable Related Parties Additions", "terseLabel": "Loan advances" } } }, "localname": "LoansAndLeasesReceivableRelatedPartiesAdditions", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds": { "auth_ref": [ "r74", "r620" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow from related parties which reduce the amount of loans and leases receivable due from related parties.", "label": "Loans And Leases Receivable Related Parties Proceeds", "terseLabel": "Loan repayments" } } }, "localname": "LoansAndLeasesReceivableRelatedPartiesProceeds", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by US and non-US government sponsored enterprise, authority, agency and program guarantees for government insured loans.", "label": "Loans Insured Or Guaranteed By Government Authorities [Axis]", "terseLabel": "Loans Insured or Guaranteed by Government Authorities" } } }, "localname": "LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Guarantee by US and non-US government sponsored enterprises, authorities, agencies and programs for government insured loans.", "label": "Loans Insured Or Guaranteed By Government Authorities [Domain]", "terseLabel": "Loans Insured or Guaranteed by Government Authorities" } } }, "localname": "LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock": { "auth_ref": [ "r188" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.", "label": "Loans Notes Trade And Other Receivables Disclosure [Text Block]", "terseLabel": "Loans and Allowance for Loan Losses" } } }, "localname": "LoansNotesTradeAndOtherReceivablesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLosses" ], "xbrltype": "textBlockItemType" }, "us-gaap_LoansReceivableFairValueDisclosure": { "auth_ref": [ "r188" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10110.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.", "label": "Loans Receivable Fair Value Disclosure", "terseLabel": "Loans, net" } } }, "localname": "LoansReceivableFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup": { "auth_ref": [ "r159", "r739" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10200.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security.", "label": "Loans Receivable Held For Sale Net Not Part Of Disposal Group", "terseLabel": "Mortgage loans held for sale" } } }, "localname": "LoansReceivableHeldForSaleNetNotPartOfDisposalGroup", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LondonInterbankOfferedRateLIBORMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Interest rate at which a bank borrows funds from other banks in the London interbank market.", "label": "London Interbank Offered Rate L I B O R [Member]", "terseLabel": "LIBOR [Member]" } } }, "localname": "LondonInterbankOfferedRateLIBORMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_LongtermDebtTypeAxis": { "auth_ref": [ "r31" ], "lang": { "en-us": { "role": { "documentation": "Information by type of long-term debt.", "label": "Longterm Debt Type [Axis]", "terseLabel": "Long-term Debt, Type" } } }, "localname": "LongtermDebtTypeAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_LongtermDebtTypeDomain": { "auth_ref": [ "r31", "r287" ], "lang": { "en-us": { "role": { "documentation": "Type of long-term debt arrangement, such as notes, line of credit, commercial paper, asset-based financing, project financing, letter of credit financing. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.", "label": "Longterm Debt Type [Domain]", "terseLabel": "Long-term Debt, Type" } } }, "localname": "LongtermDebtTypeDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_MandatorilyRedeemablePreferredStockFairValueDisclosure": { "auth_ref": [ "r289" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10040.0, "parentTag": "us-gaap_FinancialLiabilitiesFairValueDisclosure", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of shares that an entity is required to redeem for cash or other assets at a fixed or determinable date or upon the occurrence of an event.", "label": "Mandatorily Redeemable Preferred Stock Fair Value Disclosure", "terseLabel": "Junior subordinated debt" } } }, "localname": "MandatorilyRedeemablePreferredStockFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_MarketableSecuritiesPolicy": { "auth_ref": [ "r663" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for investment classified as marketable security.", "label": "Marketable Securities Policy", "terseLabel": "Securities" } } }, "localname": "MarketableSecuritiesPolicy", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_MortgagesHeldForSaleFairValueDisclosure": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10100.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Fair value portion of mortgage loans held-for-sale.", "label": "Mortgages Held For Sale Fair Value Disclosure", "terseLabel": "Mortgage loans held for sale" } } }, "localname": "MortgagesHeldForSaleFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsMeasuredAtFairValueOnNonrecurringBasisDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivities": { "auth_ref": [ "r81" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10030.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.", "label": "Net Cash Provided By Used In Financing Activities", "totalLabel": "Net cash provided by (used in) financing activities" } } }, "localname": "NetCashProvidedByUsedInFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Net Cash Provided By Used In Financing Activities [Abstract]", "terseLabel": "Cash Flows from Financing Activities" } } }, "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivities": { "auth_ref": [ "r81" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10020.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.", "label": "Net Cash Provided By Used In Investing Activities", "totalLabel": "Net cash used in investing activities" } } }, "localname": "NetCashProvidedByUsedInInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Net Cash Provided By Used In Investing Activities [Abstract]", "terseLabel": "Cash Flows from Investing Activities" } } }, "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivities": { "auth_ref": [ "r81", "r85", "r88" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10010.0, "parentTag": "us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.", "label": "Net Cash Provided By Used In Operating Activities", "totalLabel": "Net cash provided by operating activities" } } }, "localname": "NetCashProvidedByUsedInOperatingActivities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Net Cash Provided By Used In Operating Activities [Abstract]", "terseLabel": "Cash Flows from Operating Activities" } } }, "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetIncomeLoss": { "auth_ref": [ "r2", "r52", "r55", "r63", "r88", "r93", "r107", "r111", "r112", "r113", "r114", "r117", "r118", "r126", "r144", "r146", "r149", "r152", "r154", "r225", "r530", "r635", "r691" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": { "order": 10010.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.", "label": "Net Income Loss", "terseLabel": "Net income", "totalLabel": "Net Income" } } }, "localname": "NetIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoncashInvestingAndFinancingItemsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Noncash Investing And Financing Items [Abstract]", "terseLabel": "Supplemental Disclosures of Noncash Investing Activities" } } }, "localname": "NoncashInvestingAndFinancingItemsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NoninterestBearingDomesticDepositChecking": { "auth_ref": [ "r623" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10100.0, "parentTag": "us-gaap_Deposits", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of noninterest-bearing domestic checking deposit liabilities.", "label": "Noninterest Bearing Domestic Deposit Checking", "terseLabel": "Noninterest-bearing checking" } } }, "localname": "NoninterestBearingDomesticDepositChecking", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoninterestExpense": { "auth_ref": [ "r648" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10060.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": -1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10050.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Total aggregate amount of all noninterest expense.", "label": "Noninterest Expense", "totalLabel": "Total noninterest expenses" } } }, "localname": "NoninterestExpense", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoninterestExpenseAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Noninterest Expense [Abstract]", "terseLabel": "Noninterest Expenses" } } }, "localname": "NoninterestExpenseAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "stringItemType" }, "us-gaap_NoninterestExpenseDirectorsFees": { "auth_ref": [ "r648" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails": { "order": 10060.0, "parentTag": "us-gaap_OtherNoninterestExpense", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10090.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Noninterest expense related to directors' fees which are fees paid by an Entity to its directors. Directors' fees may be paid in addition to salary and other benefits.", "label": "Noninterest Expense Directors Fees", "terseLabel": "Directors' compensation", "verboseLabel": "Directors' fees" } } }, "localname": "NoninterestExpenseDirectorsFees", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoninterestIncome": { "auth_ref": [ "r646" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10040.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.", "label": "Noninterest Income", "totalLabel": "Total noninterest income" } } }, "localname": "NoninterestIncome", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_NoninterestIncomeAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Noninterest Income [Abstract]", "terseLabel": "Noninterest Income" } } }, "localname": "NoninterestIncomeAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "stringItemType" }, "us-gaap_NoninterestIncomeOtherOperatingIncome": { "auth_ref": [ "r60", "r634", "r695" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10230.0, "parentTag": "us-gaap_NoninterestIncome", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of revenue earned, classified as other, excluding interest income.", "label": "Noninterest Income Other Operating Income", "terseLabel": "Other income" } } }, "localname": "NoninterestIncomeOtherOperatingIncome", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_OccupancyNet": { "auth_ref": [ "r70", "r545", "r647" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10070.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of net occupancy expense that may include items, such as depreciation of facilities and equipment, lease expenses, property taxes and property and casualty insurance expense.", "label": "Occupancy Net", "terseLabel": "Occupancy" } } }, "localname": "OccupancyNet", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingExpensesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Operating Expenses [Abstract]", "terseLabel": "Expenses" } } }, "localname": "OperatingExpensesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_OperatingLeaseCost": { "auth_ref": [ "r552", "r559" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails": { "order": 10110.0, "parentTag": "us-gaap_LeaseCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.", "label": "Operating Lease Cost", "terseLabel": "Operating lease expense" } } }, "localname": "OperatingLeaseCost", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiability": { "auth_ref": [ "r548" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails2": { "order": 10020.0, "parentTag": "us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.", "label": "Operating Lease Liability", "verboseLabel": "Lease liability" } } }, "localname": "OperatingLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList": { "auth_ref": [ "r549" ], "lang": { "en-us": { "role": { "documentation": "Indicates line item in statement of financial position that includes operating lease liability.", "label": "Operating Lease Liability Statement Of Financial Position Extensible List", "terseLabel": "Operating Lease, Liability, Statement of Financial Position [Extensible List]" } } }, "localname": "OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails" ], "xbrltype": "extensibleListItemType" }, "us-gaap_OperatingLeasePayments": { "auth_ref": [ "r550", "r554" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.", "label": "Operating Lease Payments", "terseLabel": "Cash paid for amounts included in lease liabilities" } } }, "localname": "OperatingLeasePayments", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseRightOfUseAsset": { "auth_ref": [ "r547" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of lessee's right to use underlying asset under operating lease.", "label": "Operating Lease Right Of Use Asset", "verboseLabel": "Right-of-use asset" } } }, "localname": "OperatingLeaseRightOfUseAsset", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent": { "auth_ref": [ "r556", "r559" ], "lang": { "en-us": { "role": { "documentation": "Weighted average discount rate for operating lease calculated at point in time.", "label": "Operating Lease Weighted Average Discount Rate Percent", "terseLabel": "Weighted average discount rate" } } }, "localname": "OperatingLeaseWeightedAverageDiscountRatePercent", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails" ], "xbrltype": "percentItemType" }, "us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1": { "auth_ref": [ "r555", "r559" ], "lang": { "en-us": { "role": { "documentation": "Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Operating Lease Weighted Average Remaining Lease Term1", "terseLabel": "Weighted average remaining lease term" } } }, "localname": "OperatingLeaseWeightedAverageRemainingLeaseTerm1", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_OperatingLeasedAssetsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Operating Leased Assets [Line Items]", "terseLabel": "Operating Leased Assets [Line Items]" } } }, "localname": "OperatingLeasedAssetsLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock": { "auth_ref": [ "r3", "r102", "r138", "r483" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for the organization, consolidation and basis of presentation of financial statements disclosure, and significant accounting policies of the reporting entity. May be provided in more than one note to the financial statements, as long as users are provided with an understanding of (1) the significant judgments and assumptions made by an enterprise in determining whether it must consolidate a VIE and/or disclose information about its involvement with a VIE, (2) the nature of restrictions on a consolidated VIE's assets reported by an enterprise in its statement of financial position, including the carrying amounts of such assets, (3) the nature of, and changes in, the risks associated with an enterprise's involvement with the VIE, and (4) how an enterprise's involvement with the VIE affects the enterprise's financial position, financial performance, and cash flows. Describes procedure if disclosures are provided in more than one note to the financial statements.", "label": "Organization Consolidation And Presentation Of Financial Statements Disclosure And Significant Accounting Policies [Text Block]", "terseLabel": "Nature of Banking Activities and Significant Accounting Policies" } } }, "localname": "OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_OtherAssets": { "auth_ref": [ "r8", "r613", "r683" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails": { "order": 10040.0, "parentTag": "us-gaap_Assets", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10260.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of assets classified as other.", "label": "Other Assets", "terseLabel": "Other assets" } } }, "localname": "OtherAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherAssetsMember": { "auth_ref": [ "r492", "r507" ], "lang": { "en-us": { "role": { "documentation": "Primary financial statement caption encompassing other assets.", "label": "Other Assets [Member]", "terseLabel": "Other Assets [Member]" } } }, "localname": "OtherAssetsMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_OtherCommitmentsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Other Commitments [Abstract]", "terseLabel": "Data Processing Contractual Obligations [Abstract]" } } }, "localname": "OtherCommitmentsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_OtherCommitmentsAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by type of other commitment.", "label": "Other Commitments [Axis]", "terseLabel": "Other Commitments" } } }, "localname": "OtherCommitmentsAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_OtherCommitmentsDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Other future obligation.", "label": "Other Commitments [Domain]", "terseLabel": "Other Commitments" } } }, "localname": "OtherCommitmentsDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax": { "auth_ref": [ "r41", "r45", "r358" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.", "label": "Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax", "terseLabel": "Changes in Supplemental Executive Retirement Plans, net of tax" } } }, "localname": "OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax": { "auth_ref": [ "r45", "r49", "r50", "r358" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": 12080.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.", "label": "Other Comprehensive Income Loss Amortization Adjustment From A O C I Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax", "terseLabel": "Amortization of prior service cost" } } }, "localname": "OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax": { "auth_ref": [ "r38", "r39", "r45" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax and adjustment, of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.", "label": "Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax", "terseLabel": "Unrealized gain (loss) on securities available for sale, net of tax" } } }, "localname": "OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax": { "auth_ref": [ "r48", "r59", "r533", "r535", "r539" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax, before reclassification adjustments of other comprehensive income (loss).", "label": "Other Comprehensive Income Loss Before Reclassifications Net Of Tax", "terseLabel": "Other comprehensive income (loss) before reclassifications" } } }, "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent": { "auth_ref": [ "r45" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": { "order": 10050.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.", "label": "Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent", "terseLabel": "Change in fair value of interest rate swap, net of tax, $72, $66, and $(36), respectively" } } }, "localname": "OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent": { "auth_ref": [ "r46" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent.", "label": "Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent", "negatedLabel": "Change in fair value of interest rate swap, tax" } } }, "localname": "OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncomeParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r53", "r56", "r59", "r64", "r290", "r533", "r538", "r539", "r636", "r692" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax and reclassification adjustments of other comprehensive income (loss).", "label": "Other Comprehensive Income Loss Net Of Tax", "terseLabel": "Other comprehensive income (loss), net of tax effect" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]", "terseLabel": "Other comprehensive income (loss), net of tax:" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncomeParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent": { "auth_ref": [ "r53", "r56", "r471", "r472", "r477" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": { "order": 10020.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount after tax of other comprehensive income (loss) attributable to parent entity.", "label": "Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent", "totalLabel": "Total other comprehensive income (loss), net of tax, $(254), $(507), and $179, respectively" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent [Abstract]", "terseLabel": "Other comprehensive income (loss), net of tax:" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "stringItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax": { "auth_ref": [ "r43", "r45" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": { "order": 10060.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax, before reclassification adjustment, of (increase) decrease in accumulated other comprehensive income of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).", "label": "Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax", "negatedLabel": "Change in unrecognized benefit obligation for Supplemental Executive Retirement Plan, net of tax, $33, $(4) and $(4), respectively" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax": { "auth_ref": [ "r43", "r45", "r358", "r386" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": 12050.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.", "label": "Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax", "negatedTotalLabel": "Total recognized" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax": { "auth_ref": [ "r43", "r45" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.", "label": "Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax", "negatedTotalLabel": "Net amount recognized in other comprehensive income" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax": { "auth_ref": [ "r43", "r46", "r471" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, before reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income for defined benefit plan.", "label": "Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax", "negatedLabel": "Change in unrecognized benefit obligation for Supplemental Executive Retirement Plan, tax" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncomeParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax": { "auth_ref": [ "r41", "r45", "r358" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": 12070.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, before tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.", "label": "Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax", "terseLabel": "Net gain" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax": { "auth_ref": [ "r43", "r46", "r471" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails": { "order": 12060.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.", "label": "Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax", "negatedLabel": "Less: Income tax effect" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax": { "auth_ref": [ "r45", "r49", "r50", "r220" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": { "order": 10040.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.", "label": "Other Comprehensive Income Loss Reclassification Adjustment From A O C I For Sale Of Securities Net Of Tax", "negatedLabel": "Reclassification adjustment for gain on securities available for sale, net of tax, $208, $17, and $176, respectively" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax": { "auth_ref": [ "r46", "r220" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.", "label": "Other Comprehensive Income Loss Reclassification Adjustment From A O C I For Sale Of Securities Tax", "terseLabel": "Reclassification adjustment for gain on securities available for sale, tax" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncomeParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForInvestmentTransferredFromAvailableForSaleToEquityMethodAfterTax": { "auth_ref": [ "r50", "r222" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax, of reclassification adjustment from accumulated other comprehensive income (loss) for unrealized gain (loss) of investment classified as available-for-sale transferred to equity method.", "label": "Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Investment Transferred From Available For Sale To Equity Method After Tax", "terseLabel": "Reclassification of net unrealized gains on equity securities from Accumulated other comprehensive income (loss)" } } }, "localname": "OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForInvestmentTransferredFromAvailableForSaleToEquityMethodAfterTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossTax": { "auth_ref": [ "r46", "r64", "r432", "r458", "r460", "r533", "r536", "r539", "r636", "r692" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of tax expense (benefit) allocated to other comprehensive income (loss).", "label": "Other Comprehensive Income Loss Tax", "negatedLabel": "Other comprehensive income (loss), tax" } } }, "localname": "OtherComprehensiveIncomeLossTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncomeParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax": { "auth_ref": [ "r38", "r45" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome": { "order": 10030.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.", "label": "Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax", "terseLabel": "Change in fair value of securities available for sale, net of tax, $(567), $(586), and $43, respectively" } } }, "localname": "OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax": { "auth_ref": [ "r39", "r46" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount, before adjustment, of tax expense (benefit) for unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.", "label": "Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax", "negatedLabel": "Change in fair value of securities available for sale, tax" } } }, "localname": "OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveIncomeParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherCostAndExpenseOperating": { "auth_ref": [ "r69" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails": { "order": 10080.0, "parentTag": "us-gaap_OtherNoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.", "label": "Other Cost And Expense Operating", "terseLabel": "Other" } } }, "localname": "OtherCostAndExpenseOperating", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherExpensesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Other Expenses [Abstract]" } } }, "localname": "OtherExpensesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_OtherLiabilities": { "auth_ref": [ "r628" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10090.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of liabilities classified as other.", "label": "Other Liabilities", "terseLabel": "Other liabilities" } } }, "localname": "OtherLiabilities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherLiabilitiesMember": { "auth_ref": [ "r492", "r507" ], "lang": { "en-us": { "role": { "documentation": "Primary financial statement caption encompassing other liabilities.", "label": "Other Liabilities [Member]", "terseLabel": "Other Liabilities [Member]" } } }, "localname": "OtherLiabilitiesMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesSummaryOfDerivativeInstrumentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_OtherNoninterestExpense": { "auth_ref": [ "r648" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails": { "order": 10100.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10150.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of noninterest expense classified as other.", "label": "Other Noninterest Expense", "terseLabel": "Other operating expenses", "totalLabel": "Other operating expenses", "verboseLabel": "Miscellaneous" } } }, "localname": "OtherNoninterestExpense", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfOperationsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherOperatingIncomeAndExpenseTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for other operating income and other operating expense items.", "label": "Other Operating Income And Expense [Text Block]", "terseLabel": "Other Operating Expenses" } } }, "localname": "OtherOperatingIncomeAndExpenseTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpenses" ], "xbrltype": "textBlockItemType" }, "us-gaap_OtherRealEstate": { "auth_ref": [ "r622" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10240.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Carrying amount of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This does not include real estate assets taken in settlement of troubled loans through surrender or foreclosure.", "label": "Other Real Estate", "terseLabel": "Other real estate owned, net" } } }, "localname": "OtherRealEstate", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings": { "auth_ref": [ "r197" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings.", "label": "Other Than Temporary Impairment Loss Debt Securities Available For Sale Recognized In Earnings", "terseLabel": "Other-than-temporary impairment loss recognized" } } }, "localname": "OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PassMember": { "auth_ref": [ "r177", "r254" ], "lang": { "en-us": { "role": { "documentation": "A category of financing receivables not considered to be special mention, substandard, doubtful, and loss receivables.", "label": "Pass [Member]", "terseLabel": "Pass [Member]" } } }, "localname": "PassMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PastDueFinancingReceivablesTableTextBlock": { "auth_ref": [ "r183", "r184", "r246", "r258" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of aging analysis for financing receivable.", "label": "Past Due Financing Receivables Table [Text Block]", "terseLabel": "Schedule of Past Due Status of Loans" } } }, "localname": "PastDueFinancingReceivablesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale": { "auth_ref": [ "r80", "r84" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10260.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The amount of cash paid for the origination of mortgages that are held for sale.", "label": "Payments For Origination Of Mortgage Loans Held For Sale", "negatedLabel": "Originations of mortgage loans held for sale" } } }, "localname": "PaymentsForOriginationOfMortgageLoansHeldForSale", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForProceedsFromLoansAndLeases": { "auth_ref": [ "r101" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10140.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The net cash outflow or inflow for the increase (decrease) in the beginning and end of period of loan and lease balances which are not originated or purchased specifically for resale. Includes cash payments and proceeds associated with (a) loans held-for-investment, (b) leases held-for-investment, and (c) both.", "label": "Payments For Proceeds From Loans And Leases", "negatedLabel": "Loan originations, net" } } }, "localname": "PaymentsForProceedsFromLoansAndLeases", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForRepurchaseOfCommonStock": { "auth_ref": [ "r77" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10080.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow to reacquire common stock during the period.", "label": "Payments For Repurchase Of Common Stock", "negatedLabel": "Repurchase of common stock" } } }, "localname": "PaymentsForRepurchaseOfCommonStock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsOfDividendsCommonStock": { "auth_ref": [ "r77" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10070.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.", "label": "Payments Of Dividends Common Stock", "negatedLabel": "Cash dividends paid on common stock" } } }, "localname": "PaymentsOfDividendsCommonStock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt": { "auth_ref": [ "r73", "r75", "r196" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10110.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Payments To Acquire Available For Sale Securities Debt", "negatedLabel": "Purchase of securities available for sale", "verboseLabel": "Securities available for sale purchased" } } }, "localname": "PaymentsToAcquireAvailableForSaleSecuritiesDebt", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": { "auth_ref": [ "r76" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10120.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.", "label": "Payments To Acquire Property Plant And Equipment", "negatedLabel": "Purchase of premises and equipment" } } }, "localname": "PaymentsToAcquirePropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionAndOtherPostretirementBenefitExpenseAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Pension And Other Postretirement Benefit Expense [Abstract]", "terseLabel": "Supplemental Executive Retirement Plan [Abstract]" } } }, "localname": "PensionAndOtherPostretirementBenefitExpenseAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock": { "auth_ref": [ "r338", "r340", "r346", "r365", "r367", "r368", "r369", "r370", "r371", "r386", "r388", "r389", "r391", "r403" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for retirement benefits.", "label": "Pension And Other Postretirement Benefits Disclosure [Text Block]", "terseLabel": "Employee Benefit Plans" } } }, "localname": "PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlans" ], "xbrltype": "textBlockItemType" }, "us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent": { "auth_ref": [ "r314", "r337", "r616", "r685" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans.", "label": "Pension And Other Postretirement Defined Benefit Plans Liabilities Current And Noncurrent", "terseLabel": "Other liabilities" } } }, "localname": "PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionExpense": { "auth_ref": [], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cost (reversal of cost) for pension benefits. Excludes other postretirement benefits.", "label": "Pension Expense", "terseLabel": "Pension expense" } } }, "localname": "PensionExpense", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PerformanceSharesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Share-based payment arrangement awarded for meeting performance target.", "label": "Performance Shares [Member]", "terseLabel": "Performance-Based Stock Rights [Member]" } } }, "localname": "PerformanceSharesMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PlanNameAxis": { "auth_ref": [ "r406", "r418" ], "lang": { "en-us": { "role": { "documentation": "Information by plan name for share-based payment arrangement.", "label": "Plan Name [Axis]", "terseLabel": "Plan Name" } } }, "localname": "PlanNameAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PlanNameDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Plan name for share-based payment arrangement.", "label": "Plan Name [Domain]", "terseLabel": "Plan Name" } } }, "localname": "PlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue": { "auth_ref": [ "r586" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The sum of the fair values, as of the date of each statement of financial position presented, of securities that are restricted as collateral for the payment of related debt obligations, primarily secured borrowings and repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.", "label": "Pledged Assets Separately Reported Securities Pledged As Collateral At Fair Value", "terseLabel": "Carrying value of pledged securities" } } }, "localname": "PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PortionAtFairValueFairValueDisclosureMember": { "auth_ref": [ "r526" ], "lang": { "en-us": { "role": { "documentation": "Measured at fair value for financial reporting purposes.", "label": "Portion At Fair Value Fair Value Disclosure [Member]", "terseLabel": "Fair Value Disclosure Item Amounts [Default]" } } }, "localname": "PortionAtFairValueFairValueDisclosureMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PostageExpense": { "auth_ref": [ "r648" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails": { "order": 10010.0, "parentTag": "us-gaap_OtherNoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of expense associated with postage.", "label": "Postage Expense", "terseLabel": "Postage and courier" } } }, "localname": "PostageExpense", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PriorPeriodReclassificationAdjustmentDescription": { "auth_ref": [ "r0" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for reclassification affecting comparability of financial statement. Excludes amendment to accounting standards, other change in accounting principle, and correction of error.", "label": "Prior Period Reclassification Adjustment Description", "terseLabel": "Reclassifications" } } }, "localname": "PriorPeriodReclassificationAdjustmentDescription", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities": { "auth_ref": [ "r73", "r74", "r196" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10090.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities", "terseLabel": "Proceeds from maturities, calls and principal payments of securities available for sale", "verboseLabel": "Proceeds from calls and principal repayments" } } }, "localname": "ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt": { "auth_ref": [ "r73", "r74", "r196" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10100.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Proceeds From Sale Of Available For Sale Securities Debt", "terseLabel": "Proceeds from sales of securities available for sale", "verboseLabel": "Proceeds from sale of securities, available for sale" } } }, "localname": "ProceedsFromSaleOfAvailableForSaleSecuritiesDebt", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale": { "auth_ref": [ "r80", "r82" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10270.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The cash inflow from sales of loans that are secured with real estate mortgages and are held with the intention to resell in the near future.", "label": "Proceeds From Sale Of Mortgage Loans Held For Sale", "terseLabel": "Proceeds from mortgage loans held for sale" } } }, "localname": "ProceedsFromSaleOfMortgageLoansHeldForSale", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProfessionalFees": { "auth_ref": [ "r717", "r718" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10100.0, "parentTag": "us-gaap_NoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.", "label": "Professional Fees", "terseLabel": "Legal, audit and consulting" } } }, "localname": "ProfessionalFees", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProfitLoss": { "auth_ref": [ "r2", "r52", "r55", "r79", "r93", "r107", "r117", "r118", "r144", "r146", "r149", "r152", "r154", "r225", "r471", "r475", "r476", "r481", "r482", "r530", "r655" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails": { "order": 10010.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10150.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.", "label": "Profit Loss", "terseLabel": "Net income" } } }, "localname": "ProfitLoss", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Property Plant And Equipment [Abstract]", "terseLabel": "Premises and Equipment, Net [Abstract]", "verboseLabel": "Premises and Equipment, Net [Abstract]" } } }, "localname": "PropertyPlantAndEquipmentAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentByTypeAxis": { "auth_ref": [ "r23", "r277" ], "lang": { "en-us": { "role": { "documentation": "Information by type of long-lived, physical assets used to produce goods and services and not intended for resale.", "label": "Property Plant And Equipment By Type [Axis]", "terseLabel": "Long-Lived Tangible Asset" } } }, "localname": "PropertyPlantAndEquipmentByTypeAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock": { "auth_ref": [ "r278", "r741", "r742", "r743" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections.", "label": "Property Plant And Equipment Disclosure [Text Block]", "terseLabel": "Premises and Equipment, Net" } } }, "localname": "PropertyPlantAndEquipmentDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNet" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentGross": { "auth_ref": [ "r22", "r275" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails": { "order": 10010.0, "parentTag": "us-gaap_PropertyPlantAndEquipmentNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.", "label": "Property Plant And Equipment Gross", "terseLabel": "Premises and equipment" } } }, "localname": "PropertyPlantAndEquipmentGross", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Property Plant And Equipment [Line Items]", "terseLabel": "Property Plant And Equipment [Line Items]" } } }, "localname": "PropertyPlantAndEquipmentLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_PropertyPlantAndEquipmentNet": { "auth_ref": [ "r6", "r7", "r277", "r689" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10220.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.", "label": "Property Plant And Equipment Net", "terseLabel": "Premises and equipment, net", "totalLabel": "Premises and equipment, net" } } }, "localname": "PropertyPlantAndEquipmentNet", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyPlantAndEquipmentPolicyTextBlock": { "auth_ref": [ "r21", "r91", "r277", "r741", "r742" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections.", "label": "Property Plant And Equipment Policy [Text Block]", "terseLabel": "Premises and Equipment" } } }, "localname": "PropertyPlantAndEquipmentPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentTextBlock": { "auth_ref": [ "r6", "r277" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.", "label": "Property Plant And Equipment [Text Block]", "terseLabel": "Cost and Accumulated Depreciation of Premises and Equipment" } } }, "localname": "PropertyPlantAndEquipmentTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_PropertyPlantAndEquipmentTypeDomain": { "auth_ref": [ "r6", "r275" ], "lang": { "en-us": { "role": { "documentation": "Listing of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.", "label": "Property Plant And Equipment Type [Domain]", "terseLabel": "Long-Lived Tangible Asset" } } }, "localname": "PropertyPlantAndEquipmentTypeDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_PropertyPlantAndEquipmentUsefulLife": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.", "label": "Property Plant And Equipment Useful Life", "terseLabel": "Useful lives" } } }, "localname": "PropertyPlantAndEquipmentUsefulLife", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "durationItemType" }, "us-gaap_ProvisionForLoanAndLeaseLosses": { "auth_ref": [ "r86", "r162", "r642" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10170.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10250.0, "parentTag": "us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of expense related to estimated loss from loan and lease transactions.", "label": "Provision For Loan And Lease Losses", "terseLabel": "Provision for loan losses", "verboseLabel": "Provision (recovery)" } } }, "localname": "ProvisionForLoanAndLeaseLosses", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReceivablesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Receivables [Abstract]", "terseLabel": "Troubled Debt Restructurings [Abstract]" } } }, "localname": "ReceivablesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock": { "auth_ref": [ "r670", "r671", "r672", "r674", "r675", "r676", "r678", "r679" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for regulatory capital requirement for depository and lending institutions. Institutions include, but not are not limited to, finance company, insured depository institution, bank holding company, savings and loan association holding company, bank and savings institution not federally insured, mortgage company, foreign financial institution and credit union.", "label": "Regulatory Capital Requirements Under Banking Regulations [Text Block]", "terseLabel": "Capital Requirements" } } }, "localname": "RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirements" ], "xbrltype": "textBlockItemType" }, "us-gaap_RelatedPartyDepositLiabilities": { "auth_ref": [ "r95", "r99" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of deposits held by the entity for a related party (entity, shareholder, employee).", "label": "Related Party Deposit Liabilities", "terseLabel": "Deposits for directors" } } }, "localname": "RelatedPartyDepositLiabilities", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RelatedPartyTransactionsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Related Party Transactions [Abstract]" } } }, "localname": "RelatedPartyTransactionsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_RelatedPartyTransactionsDisclosureTextBlock": { "auth_ref": [ "r561", "r562", "r564", "r567", "r568" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.", "label": "Related Party Transactions Disclosure [Text Block]", "terseLabel": "Related Party Transactions" } } }, "localname": "RelatedPartyTransactionsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureRelatedPartyTransactions" ], "xbrltype": "textBlockItemType" }, "us-gaap_ResidentialPortfolioSegmentMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Portfolio segment of the company's total financing receivables related to residential financing receivables.", "label": "Residential Portfolio Segment [Member]", "terseLabel": "Residential Real Estate [Member]", "verboseLabel": "Residential One-to-four Unit Single Family [Member]" } } }, "localname": "ResidentialPortfolioSegmentMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RestrictedInvestments": { "auth_ref": [], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10190.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.", "label": "Restricted Investments", "terseLabel": "Restricted investments" } } }, "localname": "RestrictedInvestments", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestrictedInvestmentsAtFairValue": { "auth_ref": [ "r719", "r729" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails": { "order": 10090.0, "parentTag": "us-gaap_AssetsFairValueDisclosure", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "The aggregate value of all restricted investments.", "label": "Restricted Investments At Fair Value", "terseLabel": "Restricted investments" } } }, "localname": "RestrictedInvestmentsAtFairValue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfEstimatedFairValuesOfFinancialInstrumentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_RestrictedStockMember": { "auth_ref": [ "r130" ], "lang": { "en-us": { "role": { "documentation": "Stock including a provision that prohibits sale or substantive sale of an equity instrument for a specified period of time or until specified performance conditions are met.", "label": "Restricted Stock [Member]", "terseLabel": "Restricted Shares [Member]" } } }, "localname": "RestrictedStockMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RestrictionsOnDividendsLoansAndAdvancesTextBlock": { "auth_ref": [ "r96" ], "lang": { "en-us": { "role": { "documentation": "The entire disclosure for a banking or savings institution's compliance during the year with (a) federal and state laws and regulations relative to dividend restrictions and (b) federal laws and regulations relative to insider loans.", "label": "Restrictions On Dividends Loans And Advances [Text Block]", "terseLabel": "Dividend Limitations on Affiliate Bank" } } }, "localname": "RestrictionsOnDividendsLoansAndAdvancesTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDividendLimitationsOnAffiliateBank" ], "xbrltype": "textBlockItemType" }, "us-gaap_RetainedEarningsAccumulatedDeficit": { "auth_ref": [ "r15", "r295", "r426", "r687", "r710", "r715" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10040.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "Retained Earnings Accumulated Deficit", "terseLabel": "Retained earnings" } } }, "localname": "RetainedEarningsAccumulatedDeficit", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RetainedEarningsMember": { "auth_ref": [ "r103", "r104", "r105", "r108", "r116", "r118", "r235", "r423", "r424", "r425", "r449", "r450", "r706", "r708" ], "lang": { "en-us": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "Retained Earnings [Member]", "terseLabel": "Retained Earnings [Member]" } } }, "localname": "RetainedEarningsMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_RetirementPlanTypeAxis": { "auth_ref": [ "r311", "r312", "r313", "r316", "r317", "r318", "r319", "r320", "r321", "r322", "r323", "r324", "r325", "r326", "r328", "r329", "r330", "r331", "r332", "r333", "r334", "r335", "r336", "r337", "r338", "r339", "r341", "r342", "r343", "r344", "r345", "r346", "r347", "r348", "r349", "r350", "r351", "r352", "r353", "r354", "r355", "r356", "r357", "r358", "r359", "r361", "r363", "r364", "r366", "r369", "r373", "r376", "r377", "r378", "r379", "r380", "r381", "r382", "r383", "r384", "r385", "r386", "r387", "r391", "r392", "r393", "r394", "r395", "r396", "r398", "r399", "r400", "r401" ], "lang": { "en-us": { "role": { "documentation": "Information by type of retirement benefit plan. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.", "label": "Retirement Plan Type [Axis]", "terseLabel": "Retirement Plan Type" } } }, "localname": "RetirementPlanTypeAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfEstimatedFutureBenefitPaymentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "stringItemType" }, "us-gaap_RetirementPlanTypeDomain": { "auth_ref": [ "r311", "r312", "r313", "r316", "r317", "r318", "r319", "r320", "r321", "r322", "r323", "r324", "r325", "r326", "r328", "r329", "r330", "r331", "r332", "r333", "r334", "r335", "r336", "r337", "r338", "r339", "r341", "r342", "r343", "r344", "r345", "r346", "r347", "r348", "r349", "r350", "r351", "r352", "r353", "r354", "r355", "r356", "r357", "r358", "r359", "r361", "r363", "r364", "r366", "r369", "r373", "r376", "r377", "r378", "r379", "r380", "r381", "r382", "r383", "r384", "r385", "r386", "r387", "r391", "r392", "r393", "r394", "r395", "r396", "r398", "r399", "r400", "r401" ], "lang": { "en-us": { "role": { "documentation": "Type of plan designed to provide participants with retirement benefits. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.", "label": "Retirement Plan Type [Domain]", "terseLabel": "Retirement Plan Type" } } }, "localname": "RetirementPlanTypeDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfEstimatedFutureBenefitPaymentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "domainItemType" }, "us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax": { "auth_ref": [ "r139", "r140", "r145", "r150", "r151", "r155", "r156", "r157", "r304", "r305", "r604" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations": { "order": 10160.0, "parentTag": "us-gaap_NoninterestIncome", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.", "label": "Revenue From Contract With Customer Excluding Assessed Tax", "terseLabel": "Total noninterest income" } } }, "localname": "RevenueFromContractWithCustomerExcludingAssessedTax", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenueFromContractWithCustomerPolicyTextBlock": { "auth_ref": [ "r92", "r296", "r297", "r298", "r299", "r300", "r301", "r302", "r303", "r307" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for revenue from contract with customer.", "label": "Revenue From Contract With Customer Policy [Text Block]", "terseLabel": "Revenue Recognition" } } }, "localname": "RevenueFromContractWithCustomerPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_RisksAndUncertaintiesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Risks And Uncertainties [Abstract]" } } }, "localname": "RisksAndUncertaintiesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock": { "auth_ref": [ "r48", "r538", "r539" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the components of accumulated other comprehensive income (loss).", "label": "Schedule Of Accumulated Other Comprehensive Income Loss Table [Text Block]", "terseLabel": "Summary of Changes in Accumulated Other Comprehensive Income (Loss)" } } }, "localname": "ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock": { "auth_ref": [ "r337" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized.", "label": "Schedule Of Amounts Recognized In Balance Sheet Table [Text Block]", "terseLabel": "Amounts Recognized on Balance Sheet" } } }, "localname": "ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock": { "auth_ref": [ "r358" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost.", "label": "Schedule Of Amounts Recognized In Other Comprehensive Income Loss Table [Text Block]", "terseLabel": "Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income" } } }, "localname": "ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAssumptionsUsedTableTextBlock": { "auth_ref": [ "r360" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate.", "label": "Schedule Of Assumptions Used Table [Text Block]", "terseLabel": "Weighted Average Assumptions" } } }, "localname": "ScheduleOfAssumptionsUsedTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Schedule Of Available For Sale Securities [Line Items]", "terseLabel": "Schedule Of Available For Sale Securities [Line Items]" } } }, "localname": "ScheduleOfAvailableForSaleSecuritiesLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfAvailableForSaleSecuritiesTable": { "auth_ref": [ "r203", "r208", "r215", "r216", "r217", "r219", "r657", "r658" ], "lang": { "en-us": { "role": { "documentation": "Schedule of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.", "label": "Schedule Of Available For Sale Securities [Table]", "terseLabel": "Schedule Of Available For Sale Securities [Table]" } } }, "localname": "ScheduleOfAvailableForSaleSecuritiesTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTable": { "auth_ref": [ "r673", "r677" ], "lang": { "en-us": { "role": { "documentation": "A table disclosing the capital amounts and ratios as of the balance sheet date indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity.", "label": "Schedule Of Compliance With Regulatory Capital Requirements Under Banking Regulations [Table]", "terseLabel": "Schedule Of Compliance With Regulatory Capital Requirements Under Banking Regulations [Table]" } } }, "localname": "ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock": { "auth_ref": [ "r673", "r677" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity.", "label": "Schedule Of Compliance With Regulatory Capital Requirements Under Banking Regulations [Text Block]", "terseLabel": "Summary of Capital Amounts and Ratios" } } }, "localname": "ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock": { "auth_ref": [ "r446" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.", "label": "Schedule Of Components Of Income Tax Expense Benefit Table [Text Block]", "terseLabel": "Components of Income Tax Expense" } } }, "localname": "ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock": { "auth_ref": [ "r439" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.", "label": "Schedule Of Deferred Tax Assets And Liabilities Table [Text Block]", "terseLabel": "Net Deferred Tax Assets" } } }, "localname": "ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable": { "auth_ref": [ "r372", "r373", "r374", "r375", "r386" ], "lang": { "en-us": { "role": { "documentation": "Disclosures about an individual defined benefit pension plan or an other postretirement defined benefit plan. It may be appropriate to group certain similar plans. Also includes schedule for fair value of plan assets by major categories of plan assets by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), Significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).", "label": "Schedule Of Defined Benefit Plans Disclosures [Table]", "terseLabel": "Schedule Of Defined Benefit Plans Disclosures [Table]" } } }, "localname": "ScheduleOfDefinedBenefitPlansDisclosuresTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfEstimatedFutureBenefitPaymentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock": { "auth_ref": [ "r494" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of derivative instruments (including nonderivative instruments that are designated and qualify as hedging instruments) of (a) the location and amount of gains and losses reported in the statement of financial performance and (b) the location and fair value amounts of the instruments reported in the statement of financial position.", "label": "Schedule Of Derivatives Instruments Statements Of Financial Performance And Financial Position Location Table [Text Block]", "terseLabel": "Summary of Derivative Instruments" } } }, "localname": "ScheduleOfDerivativesInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock": { "auth_ref": [ "r433" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.", "label": "Schedule Of Effective Income Tax Rate Reconciliation Table [Text Block]", "terseLabel": "Reconciliation of Federal Statutory Tax Rate" } } }, "localname": "ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureIncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEquityMethodInvestmentsLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Schedule Of Equity Method Investments [Line Items]", "terseLabel": "Schedule Of Equity Method Investments [Line Items]" } } }, "localname": "ScheduleOfEquityMethodInvestmentsLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfEquityMethodInvestmentsTable": { "auth_ref": [ "r2", "r93", "r224", "r225", "r530" ], "lang": { "en-us": { "role": { "documentation": "Summarization of information required and determined to be disclosed concerning equity method investments in common stock. The summarized information includes: (a) the name of each investee or group of investees for which combined disclosure is appropriate, (2) the percentage ownership of common stock, (3) the difference, if any, between the carrying amount of an investment and the value of the underlying equity in the net assets and the accounting treatment of difference, if any, and (4) the aggregate value of each identified investment based on its quoted market price, if available.", "label": "Schedule Of Equity Method Investments [Table]", "terseLabel": "Schedule Of Equity Method Investments [Table]" } } }, "localname": "ScheduleOfEquityMethodInvestmentsTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureInvestmentInAffordableHousingProjectsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock": { "auth_ref": [ "r348" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter.", "label": "Schedule Of Expected Benefit Payments Table [Text Block]", "terseLabel": "Schedule of Estimated Future Benefit Payments" } } }, "localname": "ScheduleOfExpectedBenefitPaymentsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock": { "auth_ref": [ "r512", "r513" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).", "label": "Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block]", "terseLabel": "Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis" } } }, "localname": "ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable": { "auth_ref": [ "r527", "r528" ], "lang": { "en-us": { "role": { "documentation": "Schedule detailing the information required and determined to be disclosed regarding the fair value of financial assets and financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.", "label": "Schedule Of Fair Value Off Balance Sheet Risks [Table]", "terseLabel": "Schedule Of Fair Value Off Balance Sheet Risks [Table]" } } }, "localname": "ScheduleOfFairValueOffBalanceSheetRisksTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskScheduleOfContractAmountsRepresentCreditRiskDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock": { "auth_ref": [ "r527", "r528" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined) which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.", "label": "Schedule Of Fair Value Off Balance Sheet Risks [Text Block]", "terseLabel": "Schedule of Contract Amounts Represent Credit Risk" } } }, "localname": "ScheduleOfFairValueOffBalanceSheetRisksTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfFederalHomeLoanBankAdvancesByBranchOfFHLBBankTextBlock": { "auth_ref": [ "r627", "r667", "r669" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of advances by federal home loan bank by branch.", "label": "Schedule Of Federal Home Loan Bank Advances By Branch Of F H L B Bank [Text Block]", "terseLabel": "Schedule of Contractual Maturities of FHLB Advances" } } }, "localname": "ScheduleOfFederalHomeLoanBankAdvancesByBranchOfFHLBBankTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable": { "auth_ref": [ "r254", "r257" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about credit quality indicator for financing receivable.", "label": "Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table]", "terseLabel": "Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table]" } } }, "localname": "ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfFinancingReceivablesPastDueTable": { "auth_ref": [ "r246", "r258" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about aging analysis for financing receivable.", "label": "Schedule Of Financing Receivables Past Due [Table]", "terseLabel": "Schedule Of Financing Receivables Past Due [Table]" } } }, "localname": "ScheduleOfFinancingReceivablesPastDueTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfPastDueStatusOfLoansDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfImpairedFinancingReceivableTable": { "auth_ref": [ "r174" ], "lang": { "en-us": { "role": { "documentation": "Schedule of the recorded investment, unpaid principal balance, associated allowance, average recorded investment, accounting policies, and interest income recognized on the accrual and cash basis for impaired financing receivables by class of financing receivable.", "label": "Schedule Of Impaired Financing Receivable [Table]", "terseLabel": "Schedule Of Impaired Financing Receivable [Table]" } } }, "localname": "ScheduleOfImpairedFinancingReceivableTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfImpairedLoansByPortfolioSegmentDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesSummaryOfModificationClassifiedTroubledDebtRestructuringDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfNetBenefitCostsTableTextBlock": { "auth_ref": [ "r350" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.", "label": "Schedule Of Net Benefit Costs Table [Text Block]", "terseLabel": "Components of Net Periodic Benefit Cost" } } }, "localname": "ScheduleOfNetBenefitCostsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock": { "auth_ref": [ "r411" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the changes in outstanding nonvested performance-based units.", "label": "Schedule Of Nonvested Performance Based Units Activity Table [Text Block]", "terseLabel": "Unvested Performance-Based Stock Units" } } }, "localname": "ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfOperatingLeasedAssetsTable": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Schedule of long-lived, depreciable assets that are subject to a operating lease agreements and are used in the normal conduct of business to produce goods and services. Examples may include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.", "label": "Schedule Of Operating Leased Assets [Table]", "terseLabel": "Schedule Of Operating Leased Assets [Table]" } } }, "localname": "ScheduleOfOperatingLeasedAssetsTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCommitmentsAndContingentLiabilitiesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfOtherOperatingCostAndExpenseByComponentTextBlock": { "auth_ref": [ "r69" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of each detailed component of other operating costs and expenses that are applicable to sales and revenues, but not included in the cost of sales in the income statement.", "label": "Schedule Of Other Operating Cost And Expense By Component [Text Block]", "terseLabel": "Schedule of Components Other Operating Expenses" } } }, "localname": "ScheduleOfOtherOperatingCostAndExpenseByComponentTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfPropertyPlantAndEquipmentTable": { "auth_ref": [ "r23", "r277" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.", "label": "Schedule Of Property Plant And Equipment [Table]", "terseLabel": "Schedule Of Property Plant And Equipment [Table]" } } }, "localname": "ScheduleOfPropertyPlantAndEquipmentTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosurePremisesAndEquipmentNetCostAndAccumulatedDepreciationOfPremisesAndEquipmentDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable": { "auth_ref": [ "r406", "r418" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of information about share-based payment arrangement.", "label": "Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]", "terseLabel": "Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]" } } }, "localname": "ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.", "label": "Schedule Of Sharebased Compensation Restricted Stock And Restricted Stock Units Activity Table [Text Block]", "terseLabel": "Unvested Restricted Shares" } } }, "localname": "ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock": { "auth_ref": [ "r131" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit).", "label": "Schedule Of Weighted Average Number Of Shares Table [Text Block]", "terseLabel": "Weighted Average Number of Shares Used in Computing Earnings Per Share" } } }, "localname": "ScheduleOfWeightedAverageNumberOfSharesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ShareBasedArrangementsToObtainGoodsAndServicesAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Share Based Arrangements To Obtain Goods And Services [Abstract]", "terseLabel": "Stock Based Compensation [Abstract]" } } }, "localname": "ShareBasedArrangementsToObtainGoodsAndServicesAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensation": { "auth_ref": [ "r86" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails": { "order": 10040.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows": { "order": 10230.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of noncash expense for share-based payment arrangement.", "label": "Share Based Compensation", "terseLabel": "Amortization of unearned compensation, net of forfeiture" } } }, "localname": "ShareBasedCompensation", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfStatementsOfCashFlowsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod": { "auth_ref": [ "r410" ], "lang": { "en-us": { "role": { "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period", "negatedLabel": "Forfeited (in shares)", "negatedTerseLabel": "Forfeited or surrendered (in shares)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue": { "auth_ref": [ "r415" ], "lang": { "en-us": { "role": { "documentation": "Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value", "terseLabel": "Forfeited or surrendered (in dollars per share)", "verboseLabel": "Forfeited (in dollars per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod": { "auth_ref": [ "r413" ], "lang": { "en-us": { "role": { "documentation": "The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period", "terseLabel": "Granted (in shares)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue": { "auth_ref": [ "r413" ], "lang": { "en-us": { "role": { "documentation": "The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value", "terseLabel": "Granted (in dollars per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber": { "auth_ref": [ "r412" ], "lang": { "en-us": { "role": { "documentation": "The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number", "periodEndLabel": "Unvested at end of period (in shares)", "periodStartLabel": "Unvested at beginning of period (in shares)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Roll Forward", "terseLabel": "Unvested Restricted Shares [Roll Forward]", "verboseLabel": "Unvested Performance-Based Stock Rights [Roll Forward]" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue": { "auth_ref": [ "r412" ], "lang": { "en-us": { "role": { "documentation": "Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value", "periodEndLabel": "Unvested at end of period (in dollars per share)", "periodStartLabel": "Unvested at beginning of period (in dollars per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Roll Forward", "terseLabel": "Unvested Restricted Shares, Weighted Average Grant Date Fair Value Per Share [Roll Forward]", "verboseLabel": "Unvested Performance-Based Stock Rights, Weighted Average Fair Value Per Share [Roll Forward]" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod": { "auth_ref": [ "r414" ], "lang": { "en-us": { "role": { "documentation": "The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period", "negatedLabel": "Vested (in shares)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue": { "auth_ref": [ "r414" ], "lang": { "en-us": { "role": { "documentation": "The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value", "terseLabel": "Vested (in dollars per share)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "perShareItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Share Based Compensation Arrangement By Share Based Payment Award [Line Items]", "terseLabel": "Share Based Compensation Arrangement By Share Based Payment Award [Line Items]" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized": { "auth_ref": [ "r407" ], "lang": { "en-us": { "role": { "documentation": "Number of shares authorized for issuance under share-based payment arrangement.", "label": "Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized", "terseLabel": "Number of shares authorized (in shares)" } } }, "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": { "auth_ref": [ "r404", "r408" ], "lang": { "en-us": { "role": { "documentation": "Award under share-based payment arrangement.", "label": "Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]", "terseLabel": "Award Type" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedPerformanceBasedStockUnitsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureShareBasedCompensationUnvestedRestrictedSharesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy": { "auth_ref": [ "r91", "r406", "r409" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for award under share-based payment arrangement. Includes, but is not limited to, methodology and assumption used in measuring cost.", "label": "Share Based Compensation Option And Incentive Plans Policy", "terseLabel": "Share based Compensation" } } }, "localname": "ShareBasedCompensationOptionAndIncentivePlansPolicy", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_ShortTermDebtTypeAxis": { "auth_ref": [ "r27" ], "lang": { "en-us": { "role": { "documentation": "Information by type of short-term debt arrangement.", "label": "Short Term Debt Type [Axis]", "terseLabel": "Short-term Debt, Type" } } }, "localname": "ShortTermDebtTypeAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ShortTermDebtTypeDomain": { "auth_ref": [ "r25" ], "lang": { "en-us": { "role": { "documentation": "Type of short-term debt arrangement, such as notes, line of credit, commercial paper, asset-based financing, project financing, letter of credit financing.", "label": "Short Term Debt Type [Domain]", "terseLabel": "Short-term Debt, Type" } } }, "localname": "ShortTermDebtTypeDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ShortTermLeaseCost": { "auth_ref": [ "r553", "r559" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails": { "order": 10120.0, "parentTag": "us-gaap_LeaseCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of short-term lease cost, excluding expense for lease with term of one month or less.", "label": "Short Term Lease Cost", "terseLabel": "Short-term lease expense" } } }, "localname": "ShortTermLeaseCost", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLeasesScheduleOfInformationAboutLeasesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_SoftwareAndSoftwareDevelopmentCostsMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Purchased software applications and internally developed software for sale, licensing or long-term internal use.", "label": "Software And Software Development Costs [Member]", "terseLabel": "Software [Member]" } } }, "localname": "SoftwareAndSoftwareDevelopmentCostsMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SpecialMentionMember": { "auth_ref": [ "r177", "r254" ], "lang": { "en-us": { "role": { "documentation": "A category of financing receivables considered to have potential weaknesses that deserve management's close attention. If left uncorrected, those potential weaknesses may result in a deterioration of the repayment prospects for the asset or of the creditor's position at some future date.", "label": "Special Mention [Member]", "terseLabel": "Special Mention [Member]" } } }, "localname": "SpecialMentionMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_StatementEquityComponentsAxis": { "auth_ref": [ "r32", "r103", "r104", "r105", "r108", "r116", "r118", "r137", "r235", "r290", "r295", "r423", "r424", "r425", "r449", "r450", "r533", "r534", "r535", "r536", "r537", "r539", "r706", "r707", "r708" ], "lang": { "en-us": { "role": { "documentation": "Information by component of equity.", "label": "Statement Equity Components [Axis]", "terseLabel": "Equity Components" } } }, "localname": "StatementEquityComponentsAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "stringItemType" }, "us-gaap_StatementLineItems": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.", "label": "Statement [Line Items]", "terseLabel": "Statement [Line Items]" } } }, "localname": "StatementLineItems", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "stringItemType" }, "us-gaap_StatementOfCashFlowsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Statement Of Cash Flows [Abstract]" } } }, "localname": "StatementOfCashFlowsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfFinancialPositionAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Statement Of Financial Position [Abstract]" } } }, "localname": "StatementOfFinancialPositionAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Statement Of Income And Comprehensive Income [Abstract]" } } }, "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Statement Of Stockholders Equity [Abstract]" } } }, "localname": "StatementOfStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementTable": { "auth_ref": [ "r103", "r104", "r105", "r137", "r604" ], "lang": { "en-us": { "role": { "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.", "label": "Statement [Table]", "terseLabel": "Statement [Table]" } } }, "localname": "StatementTable", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfOperations" ], "xbrltype": "stringItemType" }, "us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval": { "auth_ref": [ "r96" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of dividends that can be declared or paid without approval of regulatory agency.", "label": "Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval", "terseLabel": "Aggregate amount of unrestricted funds available for dividend without prior regulatory approval" } } }, "localname": "StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDividendLimitationsOnAffiliateBankAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan": { "auth_ref": [ "r290" ], "lang": { "en-us": { "role": { "documentation": "Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity.", "label": "Stock Issued During Period Shares Dividend Reinvestment Plan", "terseLabel": "New shares issued" } } }, "localname": "StockIssuedDuringPeriodSharesDividendReinvestmentPlan", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDividendReinvestmentAndStockPurchasePlanAdditionalInformationDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_StockRepurchasedDuringPeriodShares": { "auth_ref": [ "r12", "r13", "r290", "r295" ], "lang": { "en-us": { "role": { "documentation": "Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.", "label": "Stock Repurchased During Period Shares", "terseLabel": "Repurchase of common stock (in shares)" } } }, "localname": "StockRepurchasedDuringPeriodShares", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_StockRepurchasedDuringPeriodValue": { "auth_ref": [ "r12", "r13", "r290", "r295" ], "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.", "label": "Stock Repurchased During Period Value", "negatedLabel": "Repurchase of common stock" } } }, "localname": "StockRepurchasedDuringPeriodValue", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquity": { "auth_ref": [ "r13", "r17", "r18", "r93", "r186", "r225", "r530" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10020.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.", "label": "Stockholders Equity", "periodEndLabel": "Balance", "periodStartLabel": "Balance", "totalLabel": "Total shareholders\u2019 equity" } } }, "localname": "StockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureAccumulatedOtherComprehensiveIncomeLossSummaryOfChangesInAccumulatedOtherComprehensiveIncomeLossDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Stockholders Equity [Abstract]", "terseLabel": "Shareholders\u2019 Equity" } } }, "localname": "StockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureParentCompanyOnlyFinancialStatementsScheduleOfBalanceSheetsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_StockholdersEquityNoteAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Stockholders Equity Note [Abstract]", "terseLabel": "Increase (Decrease) in Stockholders' Equity" } } }, "localname": "StockholdersEquityNoteAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquity", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfChangesInShareholdersEquityParenthetical" ], "xbrltype": "stringItemType" }, "us-gaap_SubstandardMember": { "auth_ref": [ "r177", "r254" ], "lang": { "en-us": { "role": { "documentation": "A category of financing receivables that are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the creditor will sustain some loss if the deficiencies are not corrected.", "label": "Substandard [Member]", "terseLabel": "Substandard [Member]" } } }, "localname": "SubstandardMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SupplementalCashFlowInformationAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Supplemental Cash Flow Information [Abstract]", "terseLabel": "Supplemental Disclosures of Cash Flow Information" } } }, "localname": "SupplementalCashFlowInformationAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Plan designed to provide limited group of employees with supplemental retirement benefits, in addition to other pension benefits. Includes, but is not limited to, defined benefit and defined contribution plans.", "label": "Supplemental Employee Retirement Plan Defined Benefit [Member]", "terseLabel": "Supplemental Executive Retirement Plan [Member]" } } }, "localname": "SupplementalEmployeeRetirementPlanDefinedBenefitMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfEstimatedFutureBenefitPaymentsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEmployeeBenefitPlansScheduleOfSupplementalExecutiveRetirementPlanDetails" ], "xbrltype": "domainItemType" }, "us-gaap_SuppliesExpense": { "auth_ref": [ "r648" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails": { "order": 10020.0, "parentTag": "us-gaap_OtherNoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "Amount of expense associated with supplies that were used during the current accounting period.", "label": "Supplies Expense", "terseLabel": "Paper and supplies" } } }, "localname": "SuppliesExpense", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TaxesExcludingIncomeAndExciseTaxes": { "auth_ref": [ "r67" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails": { "order": 10030.0, "parentTag": "us-gaap_OtherNoninterestExpense", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-us": { "role": { "documentation": "All taxes not related to income of the entity or excise or sales taxes levied on the revenue of the entity that are not reported elsewhere. These taxes could include production, real estate, personal property, and pump tax.", "label": "Taxes Excluding Income And Excise Taxes", "terseLabel": "Taxes, other than income taxes" } } }, "localname": "TaxesExcludingIncomeAndExciseTaxes", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureOtherOperatingExpensesScheduleOfComponentsOtherOperatingExpensesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TierOneLeverageCapital": { "auth_ref": [ "r673" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of Tier 1 leverage capital as defined by regulatory framework.", "label": "Tier One Leverage Capital", "terseLabel": "Actual amount" } } }, "localname": "TierOneLeverageCapital", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TierOneLeverageCapitalAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Tier One Leverage Capital [Abstract]", "terseLabel": "Tier One Leverage Capital [Abstract]" } } }, "localname": "TierOneLeverageCapitalAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "stringItemType" }, "us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy": { "auth_ref": [ "r673", "r677" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of minimum Tier 1 leverage capital required for capital adequacy as defined by regulatory framework.", "label": "Tier One Leverage Capital Required For Capital Adequacy", "terseLabel": "Minimum capital requirement amount" } } }, "localname": "TierOneLeverageCapitalRequiredForCapitalAdequacy", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets": { "auth_ref": [ "r673", "r677" ], "lang": { "en-us": { "role": { "documentation": "Ratio of minimum Tier 1 leverage capital to average assets required for capital adequacy as defined by regulatory framework.", "label": "Tier One Leverage Capital Required For Capital Adequacy To Average Assets", "terseLabel": "Minimum capital requirement ratio" } } }, "localname": "TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "pureItemType" }, "us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized": { "auth_ref": [ "r673" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of minimum Tier 1 leverage capital categorized as well capitalized as defined by regulatory framework for prompt corrective action.", "label": "Tier One Leverage Capital Required To Be Well Capitalized", "terseLabel": "Well capitalized under prompt corrective action provisions amount" } } }, "localname": "TierOneLeverageCapitalRequiredToBeWellCapitalized", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets": { "auth_ref": [ "r673" ], "lang": { "en-us": { "role": { "documentation": "Ratio of minimum Tier 1 leverage capital to average assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.", "label": "Tier One Leverage Capital Required To Be Well Capitalized To Average Assets", "terseLabel": "Well capitalized under prompt corrective action provisions ratio" } } }, "localname": "TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "pureItemType" }, "us-gaap_TierOneLeverageCapitalToAverageAssets": { "auth_ref": [ "r673" ], "lang": { "en-us": { "role": { "documentation": "Ratio of Tier 1 capital to average assets as defined by regulatory framework.", "label": "Tier One Leverage Capital To Average Assets", "terseLabel": "Actual ratio" } } }, "localname": "TierOneLeverageCapitalToAverageAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "pureItemType" }, "us-gaap_TierOneRiskBasedCapital": { "auth_ref": [ "r673" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of Tier 1 risk-based capital as defined by regulatory framework.", "label": "Tier One Risk Based Capital", "terseLabel": "Actual amount" } } }, "localname": "TierOneRiskBasedCapital", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TierOneRiskBasedCapitalAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Tier One Risk Based Capital [Abstract]", "terseLabel": "Tier One Risk Based Capital [Abstract]" } } }, "localname": "TierOneRiskBasedCapitalAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "stringItemType" }, "us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy": { "auth_ref": [ "r673", "r677" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of minimum Tier 1 risk-based capital required for capital adequacy as defined by regulatory framework.", "label": "Tier One Risk Based Capital Required For Capital Adequacy", "terseLabel": "Minimum capital requirement amount" } } }, "localname": "TierOneRiskBasedCapitalRequiredForCapitalAdequacy", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets": { "auth_ref": [ "r673", "r677" ], "lang": { "en-us": { "role": { "documentation": "Ratio of minimum Tier 1 risk-based capital to risk-weighted assets required for capital adequacy as defined by regulatory framework.", "label": "Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets", "terseLabel": "Minimum capital requirement ratio" } } }, "localname": "TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "pureItemType" }, "us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized": { "auth_ref": [ "r673" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of minimum Tier 1 risk-based capital categorized as well capitalized as defined by regulatory framework for prompt corrective action.", "label": "Tier One Risk Based Capital Required To Be Well Capitalized", "terseLabel": "Well capitalized under prompt corrective action provisions amount" } } }, "localname": "TierOneRiskBasedCapitalRequiredToBeWellCapitalized", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets": { "auth_ref": [ "r673" ], "lang": { "en-us": { "role": { "documentation": "Ratio of minimum Tier 1 risk-based capital to risk-weighted assets categorized as well capitalized as defined by regulatory framework for prompt corrective action.", "label": "Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets", "terseLabel": "Well capitalized under prompt corrective action provisions ratio" } } }, "localname": "TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "pureItemType" }, "us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets": { "auth_ref": [ "r673" ], "lang": { "en-us": { "role": { "documentation": "Ratio of Tier 1 risk-based capital to risk-weighted assets as defined by regulatory framework.", "label": "Tier One Risk Based Capital To Risk Weighted Assets", "terseLabel": "Actual ratio" } } }, "localname": "TierOneRiskBasedCapitalToRiskWeightedAssets", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureCapitalRequirementsSummaryOfCapitalAmountsAndRatiosDetails" ], "xbrltype": "pureItemType" }, "us-gaap_TimeDepositMaturitiesTableTextBlock": { "auth_ref": [ "r286" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of time deposit liability maturities.", "label": "Time Deposit Maturities Table [Text Block]", "terseLabel": "Scheduled Maturities of Time Deposits" } } }, "localname": "TimeDepositMaturitiesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_TimeDepositMaturitiesYearFour": { "auth_ref": [ "r286" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails": { "order": 10040.0, "parentTag": "us-gaap_TimeDeposits", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of time deposit maturing in fourth fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Time Deposit Maturities Year Four", "terseLabel": "2024" } } }, "localname": "TimeDepositMaturitiesYearFour", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TimeDepositMaturitiesYearOne": { "auth_ref": [ "r286" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails": { "order": 10010.0, "parentTag": "us-gaap_TimeDeposits", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of time deposit maturing in next fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Time Deposit Maturities Year One", "terseLabel": "2021" } } }, "localname": "TimeDepositMaturitiesYearOne", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TimeDepositMaturitiesYearThree": { "auth_ref": [ "r286" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails": { "order": 10030.0, "parentTag": "us-gaap_TimeDeposits", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of time deposit maturing in third fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Time Deposit Maturities Year Three", "terseLabel": "2023" } } }, "localname": "TimeDepositMaturitiesYearThree", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TimeDepositMaturitiesYearTwo": { "auth_ref": [ "r286" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails": { "order": 10020.0, "parentTag": "us-gaap_TimeDeposits", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of time deposit maturing in second fiscal year following current fiscal year. Time deposit includes, but is not limited to, certificate of deposit. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).", "label": "Time Deposit Maturities Year Two", "terseLabel": "2022" } } }, "localname": "TimeDepositMaturitiesYearTwo", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TimeDeposits": { "auth_ref": [ "r623", "r666" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets": { "order": 10140.0, "parentTag": "us-gaap_InterestBearingDepositLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of time deposit liabilities, including certificates of deposit.", "label": "Time Deposits", "terseLabel": "Time deposits", "totalLabel": "Total" } } }, "localname": "TimeDeposits", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails", "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_TimeDepositsAtOrAboveFDICInsuranceLimit": { "auth_ref": [ "r666" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "Amount of time deposit liabilities, including certificates of deposit, in denominations that meet or exceed the Federal Deposit Insurance Corporation (FDIC) insurance limit.", "label": "Time Deposits At Or Above F D I C Insurance Limit", "terseLabel": "Time deposits, above $250,000" } } }, "localname": "TimeDepositsAtOrAboveFDICInsuranceLimit", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsAdditionalInformationDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_TimeDepositsByMaturityAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Time Deposits By Maturity [Abstract]", "terseLabel": "Scheduled Maturities of Time Deposits [Abstract]" } } }, "localname": "TimeDepositsByMaturityAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDepositsScheduledMaturitiesOfTimeDepositsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_TransfersAndServicingOfFinancialAssetsTransfersOfFinancialAssetsPolicy": { "auth_ref": [ "r91", "r569", "r579", "r580", "r585" ], "lang": { "en-us": { "role": { "documentation": "Disclosure of accounting policy for transfers of financial assets, including securitization transactions. The disclosure is generally expected to include how the entity determines whether a transaction is accounted for as a sale or financing, and the initial and subsequent accounting for such a transaction. The disclosure also may address how interests that are obtained and sold, or those that continue to be held, in such transactions are measured and accounted for, and the methodology and significant assumptions used to value such interests, and the gains or losses resulting from the sale.", "label": "Transfers And Servicing Of Financial Assets Transfers Of Financial Assets Policy", "terseLabel": "Transfers of Financial Assets" } } }, "localname": "TransfersAndServicingOfFinancialAssetsTransfersOfFinancialAssetsPolicy", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain": { "auth_ref": [ "r209", "r210", "r570", "r571", "r572", "r573", "r574", "r575", "r576", "r577", "r578", "r581", "r582", "r583", "r584", "r586", "r587", "r588", "r589", "r590", "r591", "r592", "r593", "r594", "r595", "r596", "r597", "r598", "r599", "r600", "r601", "r602" ], "lang": { "en-us": { "role": { "documentation": "Instrument or contract that imposes a contractual obligation to deliver cash or another financial instrument or to exchange other financial instruments on potentially unfavorable terms and conveys a contractual right to receive cash or another financial instrument or to exchange other financial instruments on potentially favorable terms.", "label": "Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain]", "terseLabel": "Financial Instruments" } } }, "localname": "TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFederalHomeLoanBankAdvancesAndOtherBorrowingsAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFinancialInstrumentsWithOffBalanceSheetRiskScheduleOfContractAmountsRepresentCreditRiskDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock": { "auth_ref": [ "r178", "r179" ], "lang": { "en-us": { "role": { "documentation": "Tabular disclosure of financing receivable modified as troubled debt restructuring.", "label": "Troubled Debt Restructurings On Financing Receivables Table [Text Block]", "terseLabel": "Summary of Modification Classified Troubled Debt Restructuring" } } }, "localname": "TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_TypeOfAdoptionMember": { "auth_ref": [ "r107", "r108", "r109", "r110", "r232", "r233", "r234", "r235", "r237", "r238", "r419", "r420", "r421", "r422", "r423", "r424", "r425", "r426", "r447", "r448", "r449", "r450", "r605", "r606", "r607", "r704", "r705", "r706", "r707", "r708", "r709", "r710", "r711", "r712", "r713", "r714", "r715" ], "lang": { "en-us": { "role": { "documentation": "Amendment to accounting standards.", "label": "Type Of Adoption [Member]", "terseLabel": "Accounting Standards Update" } } }, "localname": "TypeOfAdoptionMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_TypeOfArrangementAxis": { "auth_ref": [ "r469" ], "lang": { "en-us": { "role": { "documentation": "Information by collaborative arrangement and arrangement other than collaborative applicable to revenue-generating activity or operations.", "label": "Type Of Arrangement [Axis]", "terseLabel": "Collaborative Arrangement and Arrangement Other than Collaborative" } } }, "localname": "TypeOfArrangementAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureNatureOfBankingActivitiesAndSignificantAccountingPoliciesAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_USStatesAndPoliticalSubdivisionsMember": { "auth_ref": [ "r339", "r716" ], "lang": { "en-us": { "role": { "documentation": "Bonds or similar securities issued by state, city, or local US governments or the agencies operated by state, city, or local governments. Debt securities issued by state governments may include bond issuances of US state authorities including, for example, but not limited to, housing authorities, dormitory authorities, and general obligations while debt securities issued by political subdivisions of US states would include, for example, debt issuances by county, borough, city, or municipal governments.", "label": "U S States And Political Subdivisions [Member]", "terseLabel": "Obligations of States and Political Subdivisions [Member]", "verboseLabel": "Obligations of States and Political Subdivisions [Member]" } } }, "localname": "USStatesAndPoliticalSubdivisionsMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_USTreasuryAndGovernmentMember": { "auth_ref": [ "r339", "r656", "r716" ], "lang": { "en-us": { "role": { "documentation": "This category includes investments in debt securities issued by the United States Department of the Treasury, US Government Agencies and US Government-sponsored Enterprises. Such securities may include treasury bills (short-term maturities - one year or less), treasury notes (intermediate term maturities - two to ten years), and treasury bonds (long-term maturities - ten to thirty years), debt securities issued by the Government National Mortgage Association (Ginnie Mae) and debt securities issued by the Federal National Mortgage Association (Fannie Mae) or the Federal Home Loan Mortgage Corporation (Freddie Mac).", "label": "U S Treasury And Government [Member]", "terseLabel": "Obligations of U.S. Government Corporations and Agencies [Member]", "verboseLabel": "Obligations of U.S. Government Corporations and Agencies [Member]" } } }, "localname": "USTreasuryAndGovernmentMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesScheduleOfSecuritiesWithGrossUnrealizedLossesAndFairValueAggregatedByInvestmentCategoryAndLengthOfTimeInContinuousUnrealizedLossPositionDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureSecuritiesSummaryOfAmortizedCostAndFairValueOfSecuritiesAvailableForSaleWithUnrealizedGainsAndLossesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_UnallocatedFinancingReceivablesMember": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Financing receivables that have not been allocated to a portfolio segment.", "label": "Unallocated Financing Receivables [Member]", "terseLabel": "Unallocated [Member]" } } }, "localname": "UnallocatedFinancingReceivablesMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfAllowanceForLoanLossesByPortfolioSegmentDetails" ], "xbrltype": "domainItemType" }, "us-gaap_UnlikelyToBeCollectedFinancingReceivableMember": { "auth_ref": [ "r177", "r254" ], "lang": { "en-us": { "role": { "documentation": "Financing arrangement that represents a contractual right to receive money either on demand or on fixed or determinable dates that are considered uncollectible or of little value. Excludes no recovery or salvage value.", "label": "Unlikely To Be Collected Financing Receivable [Member]", "terseLabel": "Loss [Member]" } } }, "localname": "UnlikelyToBeCollectedFinancingReceivableMember", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureLoansAndAllowanceForLoanLossesScheduleOfLoansByCreditQualityIndicatorsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_UnrealizedGainLossOnDerivatives": { "auth_ref": [ "r87" ], "crdr": "credit", "lang": { "en-us": { "role": { "documentation": "The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.", "label": "Unrealized Gain Loss On Derivatives", "terseLabel": "Unrealized gain (loss) on interest rate swaps, net of tax" } } }, "localname": "UnrealizedGainLossOnDerivatives", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ValuationTechniqueAxis": { "auth_ref": [ "r515" ], "lang": { "en-us": { "role": { "documentation": "Information by valuation approach and technique.", "label": "Valuation Technique [Axis]", "terseLabel": "Valuation Approach and Technique" } } }, "localname": "ValuationTechniqueAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ValuationTechniqueDomain": { "auth_ref": [ "r515" ], "lang": { "en-us": { "role": { "documentation": "Valuation approach and technique.", "label": "Valuation Technique [Domain]", "terseLabel": "Valuation Approach and Technique" } } }, "localname": "ValuationTechniqueDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" ], "xbrltype": "domainItemType" }, "us-gaap_VariableRateAxis": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Information by type of variable rate.", "label": "Variable Rate [Axis]", "terseLabel": "Variable Rate" } } }, "localname": "VariableRateAxis", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "stringItemType" }, "us-gaap_VariableRateDomain": { "auth_ref": [], "lang": { "en-us": { "role": { "documentation": "Interest rate that fluctuates over time as a result of an underlying benchmark interest rate or index.", "label": "Variable Rate [Domain]", "terseLabel": "Variable Rate" } } }, "localname": "VariableRateDomain", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureDerivativeInstrumentsAndHedgingActivitiesAdditionalInformationDetails", "http://www.tfb.bank/20201231/taxonomy/role/DisclosureJuniorSubordinatedDebtAdditionalInformationDetails" ], "xbrltype": "domainItemType" }, "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": { "auth_ref": [ "r121", "r129" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareWeightedAverageNumberOfSharesUsedInComputingEarningsPerShareDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "lang": { "en-us": { "role": { "documentation": "The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.", "label": "Weighted Average Number Of Diluted Shares Outstanding", "totalLabel": "Diluted earnings per share (in shares)" } } }, "localname": "WeightedAverageNumberOfDilutedSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareWeightedAverageNumberOfSharesUsedInComputingEarningsPerShareDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": { "auth_ref": [ "r120", "r129" ], "calculation": { "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareWeightedAverageNumberOfSharesUsedInComputingEarningsPerShareDetails": { "order": 10010.0, "parentTag": "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding", "weight": 1.0 } }, "lang": { "en-us": { "role": { "documentation": "Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.", "label": "Weighted Average Number Of Shares Outstanding Basic", "terseLabel": "Basic earnings per share (in shares)" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingBasic", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareWeightedAverageNumberOfSharesUsedInComputingEarningsPerShareDetails" ], "xbrltype": "sharesItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract": { "auth_ref": [], "lang": { "en-us": { "role": { "label": "Weighted Average Number Of Shares Outstanding Diluted Disclosure Items [Abstract]", "terseLabel": "Shares [Abstract]" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract", "nsuri": "http://fasb.org/us-gaap/2020-01-31", "presentation": [ "http://www.tfb.bank/20201231/taxonomy/role/DisclosureEarningsPerShareWeightedAverageNumberOfSharesUsedInComputingEarningsPerShareDetails" ], "xbrltype": "stringItemType" } }, "unitCount": 13 } }, "std_ref": { "r0": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=6359566&loc=d3e326-107755" }, "r1": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-04(Schedule I))", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=120391182&loc=d3e5864-122674" }, "r10": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(26)(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r100": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(n))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" }, "r101": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.12-04(a))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690" }, "r102": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "235", "URI": "http://asc.fasb.org/topic&trid=2122369" }, "r103": { "Name": "Accounting Standards Codification", "Paragraph": "23", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21914-107793" }, "r104": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21930-107793" }, "r105": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=115929471&loc=d3e21711-107793" }, "r106": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794" }, "r107": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(2)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794" }, "r108": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(3)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794" }, "r109": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(4)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794" }, "r11": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(26)(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r110": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794" }, "r111": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794" }, "r112": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794" }, "r113": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794" }, "r114": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22595-107794" }, "r115": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794" }, "r116": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794" }, "r117": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794" }, "r118": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794" }, "r119": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=112272810&loc=d3e31010-122693" }, "r12": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(28))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r120": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1448-109256" }, "r121": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1505-109256" }, "r122": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1252-109256" }, "r123": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1707-109256" }, "r124": { "Name": "Accounting Standards Codification", "Paragraph": "23", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1757-109256" }, "r125": { "Name": "Accounting Standards Codification", "Paragraph": "28A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1500-109256" }, "r126": { "Name": "Accounting Standards Codification", "Paragraph": "60B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=SL5780133-109256" }, "r127": { "Name": "Accounting Standards Codification", "Paragraph": "60B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=SL5780133-109256" }, "r128": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=121326447&loc=d3e1337-109256" }, "r129": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r13": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(29))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r130": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r131": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r132": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3630-109257" }, "r133": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537" }, "r134": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=120380238&loc=d3e3842-109258" }, "r135": { "Name": "Accounting Standards Codification", "Paragraph": "52", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=120380238&loc=d3e4984-109258" }, "r136": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "260", "URI": "http://asc.fasb.org/topic&trid=2144383" }, "r137": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "272", "URI": "http://asc.fasb.org/extlink&oid=6828210&loc=d3e70191-108054" }, "r138": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "275", "URI": "http://asc.fasb.org/topic&trid=2134479" }, "r139": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599" }, "r14": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r140": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599" }, "r141": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599" }, "r142": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599" }, "r143": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599" }, "r144": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599" }, "r145": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599" }, "r146": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599" }, "r147": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599" }, "r148": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599" }, "r149": { "Name": "Accounting Standards Codification", "Paragraph": "31", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599" }, "r15": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r150": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599" }, "r151": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599" }, "r152": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599" }, "r153": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599" }, "r154": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599" }, "r155": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599" }, "r156": { "Name": "Accounting Standards Codification", "Paragraph": "41", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599" }, "r157": { "Name": "Accounting Standards Codification", "Paragraph": "42", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599" }, "r158": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121593590&loc=d3e4647-111522" }, "r159": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522" }, "r16": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(4))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r160": { "Name": "Accounting Standards Codification", "Paragraph": "11B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524" }, "r161": { "Name": "Accounting Standards Codification", "Paragraph": "11B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524" }, "r162": { "Name": "Accounting Standards Codification", "Paragraph": "11B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524" }, "r163": { "Name": "Accounting Standards Codification", "Paragraph": "11B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(3)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524" }, "r164": { "Name": "Accounting Standards Codification", "Paragraph": "11B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(4)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524" }, "r165": { "Name": "Accounting Standards Codification", "Paragraph": "11B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524" }, "r166": { "Name": "Accounting Standards Codification", "Paragraph": "11B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524" }, "r167": { "Name": "Accounting Standards Codification", "Paragraph": "11B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524" }, "r168": { "Name": "Accounting Standards Codification", "Paragraph": "14A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953550-111524" }, "r169": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(3)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524" }, "r17": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r170": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(4)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524" }, "r171": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b,d)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524" }, "r172": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524" }, "r173": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524" }, "r174": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524" }, "r175": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5258-111524" }, "r176": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5033-111524" }, "r177": { "Name": "Accounting Standards Codification", "Paragraph": "29", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953659-111524" }, "r178": { "Name": "Accounting Standards Codification", "Paragraph": "33", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524" }, "r179": { "Name": "Accounting Standards Codification", "Paragraph": "34", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524" }, "r18": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(31))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r180": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5093-111524" }, "r181": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524" }, "r182": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524" }, "r183": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524" }, "r184": { "Name": "Accounting Standards Codification", "Paragraph": "7A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524" }, "r185": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121611835&loc=d3e5144-111524" }, "r186": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 4.E)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707" }, "r187": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 6.L.1)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707" }, "r188": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/subtopic&trid=2196772" }, "r189": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=84159169&loc=d3e10133-111534" }, "r19": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(32))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r190": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=84159169&loc=d3e10133-111534" }, "r191": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=84159169&loc=d3e10149-111534" }, "r192": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=84159169&loc=d3e10178-111534" }, "r193": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)(1)(ii)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544" }, "r194": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554" }, "r195": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562" }, "r196": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121553693&loc=d3e26853-111562" }, "r197": { "Name": "Accounting Standards Codification", "Paragraph": "8A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121553693&loc=SL6284422-111562" }, "r198": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563" }, "r199": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(aa)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563" }, "r2": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760" }, "r20": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.12)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r200": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563" }, "r201": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563" }, "r202": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563" }, "r203": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563" }, "r204": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563" }, "r205": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563" }, "r206": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563" }, "r207": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563" }, "r208": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27198-111563" }, "r209": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563" }, "r21": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.13(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r210": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=SL120269820-111563" }, "r211": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563" }, "r212": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563" }, "r213": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(2)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563" }, "r214": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)(3)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563" }, "r215": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563" }, "r216": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563" }, "r217": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27340-111563" }, "r218": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27357-111563" }, "r219": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)-(d)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27357-111563" }, "r22": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.13)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r220": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=121645371&loc=d3e27357-111563" }, "r221": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "320", "URI": "http://asc.fasb.org/topic&trid=2196928" }, "r222": { "Name": "Accounting Standards Codification", "Paragraph": "33", "Publisher": "FASB", "Section": "35", "SubTopic": "10", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=121548190&loc=d3e32804-111569" }, "r223": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570" }, "r224": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(b)", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571" }, "r225": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571" }, "r226": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "740", "Subparagraph": "(a)", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985" }, "r227": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "740", "Subparagraph": "(b)", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985" }, "r228": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "740", "Subparagraph": "(d)", "Topic": "323", "URI": "http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985" }, "r229": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL120254519-210437" }, "r23": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.14)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r230": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL120320025-210437" }, "r231": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL120320025-210437" }, "r232": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437" }, "r233": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437" }, "r234": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437" }, "r235": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437" }, "r236": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(e)(1)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437" }, "r237": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(e)(3)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437" }, "r238": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(e)(4)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121646688&loc=SL121648383-210437" }, "r239": { "Name": "Accounting Standards Codification", "Paragraph": "4A", "Publisher": "FASB", "Section": "30", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121647444&loc=SL120269210-210444" }, "r24": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.17)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r240": { "Name": "Accounting Standards Codification", "Paragraph": "5A", "Publisher": "FASB", "Section": "30", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121647444&loc=SL120254536-210444" }, "r241": { "Name": "Accounting Standards Codification", "Paragraph": "8A", "Publisher": "FASB", "Section": "35", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121648281&loc=SL120267834-210445" }, "r242": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599878&loc=SL120267845-210446" }, "r243": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919244-210447" }, "r244": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447" }, "r245": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447" }, "r246": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447" }, "r247": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447" }, "r248": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447" }, "r249": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447" }, "r25": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r250": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919260-210447" }, "r251": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919272-210447" }, "r252": { "Name": "Accounting Standards Codification", "Paragraph": "3C", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL120267966-210447" }, "r253": { "Name": "Accounting Standards Codification", "Paragraph": "3D", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL120267969-210447" }, "r254": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447" }, "r255": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121647567&loc=SL82921830-210448" }, "r256": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121647567&loc=SL82921842-210448" }, "r257": { "Name": "Accounting Standards Codification", "Paragraph": "79", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448" }, "r258": { "Name": "Accounting Standards Codification", "Paragraph": "80", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448" }, "r259": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "30", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121614247&loc=SL120267897-210452" }, "r26": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19(b),22(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r260": { "Name": "Accounting Standards Codification", "Paragraph": "13A", "Publisher": "FASB", "Section": "35", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121565518&loc=SL120267917-210453" }, "r261": { "Name": "Accounting Standards Codification", "Paragraph": "7A", "Publisher": "FASB", "Section": "35", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121565518&loc=SL120269220-210453" }, "r262": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454" }, "r263": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL120267853-210455" }, "r264": { "Name": "Accounting Standards Codification", "Paragraph": "3C", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL120267859-210455" }, "r265": { "Name": "Accounting Standards Codification", "Paragraph": "3D", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL120267862-210455" }, "r266": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(1)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455" }, "r267": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(2)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455" }, "r268": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)(3)", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455" }, "r269": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455" }, "r27": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r270": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455" }, "r271": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922895-210455" }, "r272": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455" }, "r273": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "55", "SubTopic": "30", "Topic": "326", "URI": "http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456" }, "r274": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r275": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r276": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r277": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r278": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "360", "URI": "http://asc.fasb.org/topic&trid=2155823" }, "r279": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "440", "URI": "http://asc.fasb.org/extlink&oid=121559207&loc=d3e25336-109308" }, "r28": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19-26)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r280": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "440", "URI": "http://asc.fasb.org/extlink&oid=121559207&loc=d3e25336-109308" }, "r281": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "440", "URI": "http://asc.fasb.org/topic&trid=2144648" }, "r282": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "450", "URI": "http://asc.fasb.org/topic&trid=2127136" }, "r283": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "460", "URI": "http://asc.fasb.org/extlink&oid=121548805&loc=d3e10037-110241" }, "r284": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(4)", "Topic": "460", "URI": "http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248" }, "r285": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "460", "URI": "http://asc.fasb.org/extlink&oid=121596127&loc=d3e12803-110250" }, "r286": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601" }, "r287": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=6802200&loc=SL6230698-112601" }, "r288": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "470", "URI": "http://asc.fasb.org/topic&trid=2208564" }, "r289": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Topic": "480", "URI": "http://asc.fasb.org/extlink&oid=109262497&loc=d3e21216-110875" }, "r29": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.20)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r290": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644" }, "r291": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644" }, "r292": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644" }, "r293": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644" }, "r294": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644" }, "r295": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.3-04)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770" }, "r296": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130561-203045" }, "r297": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130563-203045" }, "r298": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130563-203045" }, "r299": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130564-203045" }, "r3": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "205", "URI": "http://asc.fasb.org/topic&trid=2122149" }, "r30": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22 (b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r300": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130566-203045" }, "r301": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130566-203045" }, "r302": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130566-203045" }, "r303": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130566-203045" }, "r304": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045" }, "r305": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045" }, "r306": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=121551570&loc=SL49130690-203046-203046" }, "r307": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "606", "URI": "http://asc.fasb.org/topic&trid=49130388" }, "r308": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Topic": "710", "URI": "http://asc.fasb.org/extlink&oid=75028277&loc=d3e19793-108362" }, "r309": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "30", "SubTopic": "10", "Topic": "710", "URI": "http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363" }, "r31": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r310": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "30", "SubTopic": "10", "Topic": "710", "URI": "http://asc.fasb.org/extlink&oid=6409875&loc=d3e20028-108363" }, "r311": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "712", "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664" }, "r312": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "712", "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664" }, "r313": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919" }, "r314": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=d3e1731-114919" }, "r315": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919" }, "r316": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r317": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r318": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(10)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r319": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r32": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29-31)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r320": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r321": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r322": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(5)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r323": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(6)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r324": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(7)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r325": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(8)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r326": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(9)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r327": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(b)(c)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r328": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r329": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r33": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.8)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r330": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r331": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r332": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r333": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(5)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r334": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(6)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r335": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(7)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r336": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(8)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r337": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r338": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(i)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r339": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(ii)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r34": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312" }, "r340": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iii)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r341": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(01)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r342": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(02)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r343": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(02)(A)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r344": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(02)(B)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r345": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(02)(C)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r346": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(03)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r347": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(e)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r348": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(f)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r349": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r35": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(2)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312" }, "r350": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r351": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r352": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r353": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r354": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r355": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(5)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r356": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(6)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r357": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(7)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r358": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(i)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r359": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(j)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r36": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313" }, "r360": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(k)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r361": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(k)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r362": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(k)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r363": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(k)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r364": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(k)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r365": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(l)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r366": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(n)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r367": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(o)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r368": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(p)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r369": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(q)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r37": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313" }, "r370": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(r)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r371": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(r)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r372": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920" }, "r373": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2410-114920" }, "r374": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920" }, "r375": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2439-114920" }, "r376": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r377": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r378": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r379": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r38": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580" }, "r380": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r381": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(5)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r382": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(6)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r383": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(7)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r384": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920" }, "r385": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118255775&loc=d3e2919-114920" }, "r386": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921" }, "r387": { "Name": "Accounting Standards Codification", "Paragraph": "18", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=118257860&loc=d3e4587-114921" }, "r388": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=21916913&loc=d3e273930-122802" }, "r389": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "60", "Subparagraph": "(c)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=6414203&loc=d3e39689-114964" }, "r39": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580" }, "r390": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "60", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964" }, "r391": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "70", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942" }, "r392": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "35", "SubTopic": "80", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=29639808&loc=d3e29008-114946" }, "r393": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(a)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947" }, "r394": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(b)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947" }, "r395": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(c)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947" }, "r396": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947" }, "r397": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(d)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947" }, "r398": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(a)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947" }, "r399": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(b)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947" }, "r4": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=121566466&loc=d3e6812-107765" }, "r40": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580" }, "r400": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(c)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450673-114947" }, "r401": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(b)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947" }, "r402": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "55", "SubTopic": "80", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948" }, "r403": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "715", "URI": "http://asc.fasb.org/topic&trid=2235017" }, "r404": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901" }, "r405": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901" }, "r406": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901" }, "r407": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r408": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a),(g)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r409": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b),(f)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r41": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580" }, "r410": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(iv)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r411": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r412": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(i)-(ii)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r413": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r414": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r415": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)(iii)(3)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r416": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)(1)(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r417": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(i)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r418": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901" }, "r419": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333" }, "r42": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i),(j),(k)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580" }, "r420": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333" }, "r421": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333" }, "r422": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333" }, "r423": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333" }, "r424": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(f)(1)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333" }, "r425": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(f)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333" }, "r426": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(g)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333" }, "r427": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 14.F)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809" }, "r428": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "718", "URI": "http://asc.fasb.org/topic&trid=2228938" }, "r429": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "35", "Subparagraph": "(a)", "Topic": "720", "URI": "http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848" }, "r43": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i-k)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580" }, "r430": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=120406818&loc=d3e32247-109318" }, "r431": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=120406818&loc=d3e32280-109318" }, "r432": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319" }, "r433": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319" }, "r434": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32705-109319" }, "r435": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32809-109319" }, "r436": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319" }, "r437": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r438": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r439": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r44": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580" }, "r440": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32847-109319" }, "r441": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32857-109319" }, "r442": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319" }, "r443": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319" }, "r444": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r445": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r446": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r447": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740" }, "r448": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740" }, "r449": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(d)(2)", "Topic": "740" }, "r45": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580" }, "r450": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(d)(3)", "Topic": "740" }, "r451": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(e)(3)", "Topic": "740" }, "r452": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 6.I.5.Q1)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r453": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 6.I.7)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r454": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 6.I.7)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r455": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 6.I.Fact.1)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r456": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 6.I.Fact.2)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817" }, "r457": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 11.C)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=116825942&loc=d3e330215-122817" }, "r458": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=120385591&loc=d3e39076-109324" }, "r459": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=120385591&loc=d3e38679-109324" }, "r46": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580" }, "r460": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=120385591&loc=d3e38679-109324" }, "r461": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "270", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338" }, "r462": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331" }, "r463": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "740", "URI": "http://asc.fasb.org/topic&trid=2144680" }, "r464": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "05", "SubTopic": "10", "Subparagraph": "(a)-(d)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=6909625&loc=d3e227-128457" }, "r465": { "Name": "Accounting Standards Codification", "Paragraph": "23", "Publisher": "FASB", "Section": "25", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460" }, "r466": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463" }, "r467": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1486-128463" }, "r468": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)(4)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479" }, "r469": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "808", "URI": "http://asc.fasb.org/extlink&oid=6931272&loc=SL5834143-161434" }, "r47": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e681-108580" }, "r470": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=d3e5283-111683" }, "r471": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683" }, "r472": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569643-111683" }, "r473": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988" }, "r474": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988" }, "r475": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r476": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r477": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(3)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r478": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c),(3)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r479": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bb)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685" }, "r48": { "Name": "Accounting Standards Codification", "Paragraph": "14A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580" }, "r480": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685" }, "r481": { "Name": "Accounting Standards Codification", "Paragraph": "4J", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=120409616&loc=SL4591551-111686" }, "r482": { "Name": "Accounting Standards Codification", "Paragraph": "4K", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=120409616&loc=SL4591552-111686" }, "r483": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "810", "URI": "http://asc.fasb.org/topic&trid=2197479" }, "r484": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579240-113959" }, "r485": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959" }, "r486": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959" }, "r487": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959" }, "r488": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)(i)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41620-113959" }, "r489": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)(ii)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41620-113959" }, "r49": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e689-108580" }, "r490": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41620-113959" }, "r491": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41638-113959" }, "r492": { "Name": "Accounting Standards Codification", "Paragraph": "4A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959" }, "r493": { "Name": "Accounting Standards Codification", "Paragraph": "4A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959" }, "r494": { "Name": "Accounting Standards Codification", "Paragraph": "4A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959" }, "r495": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959" }, "r496": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959" }, "r497": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959" }, "r498": { "Name": "Accounting Standards Codification", "Paragraph": "4C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959" }, "r499": { "Name": "Accounting Standards Codification", "Paragraph": "4C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959" }, "r5": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r50": { "Name": "Accounting Standards Codification", "Paragraph": "17A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL34724391-108580" }, "r500": { "Name": "Accounting Standards Codification", "Paragraph": "4D", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(1)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959" }, "r501": { "Name": "Accounting Standards Codification", "Paragraph": "4D", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959" }, "r502": { "Name": "Accounting Standards Codification", "Paragraph": "4K", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)(4)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=SL5708775-113959" }, "r503": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41641-113959" }, "r504": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41675-113959" }, "r505": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41678-113959" }, "r506": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121590274&loc=d3e41678-113959" }, "r507": { "Name": "Accounting Standards Codification", "Paragraph": "182", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121582272&loc=SL5629052-113961" }, "r508": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "65", "SubTopic": "20", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121483254&loc=SL120254523-199619" }, "r509": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "25", "Subparagraph": "(a)(1),(2)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986" }, "r51": { "Name": "Accounting Standards Codification", "Paragraph": "17B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL34724394-108580" }, "r510": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "25", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986" }, "r511": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "815", "URI": "http://asc.fasb.org/topic&trid=2229140" }, "r512": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r513": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r514": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bb)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r515": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bbb)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r516": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bbb)(1)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r517": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bbb)(2)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r518": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r519": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r52": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580" }, "r520": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r521": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258" }, "r522": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258" }, "r523": { "Name": "Accounting Standards Codification", "Paragraph": "6A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258" }, "r524": { "Name": "Accounting Standards Codification", "Paragraph": "6A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258" }, "r525": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=117817908&loc=SL117819236-161440" }, "r526": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=116690757&loc=d3e13220-108610" }, "r527": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611" }, "r528": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611" }, "r529": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=121572278&loc=d3e13476-108611" }, "r53": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580" }, "r530": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612" }, "r531": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=120240428&loc=SL120254526-165497" }, "r532": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "230", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906" }, "r533": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900" }, "r534": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900" }, "r535": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Subparagraph": "(b)", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900" }, "r536": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Subparagraph": "(c)", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900" }, "r537": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Subparagraph": "(d)", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900" }, "r538": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900" }, "r539": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "830", "URI": "http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901" }, "r54": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580" }, "r540": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391" }, "r541": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399" }, "r542": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399" }, "r543": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399" }, "r544": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "55", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400" }, "r545": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "840", "URI": "http://asc.fasb.org/extlink&oid=121616839&loc=d3e45280-112737" }, "r546": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "65", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121329987&loc=SL120154346-209984" }, "r547": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977" }, "r548": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977" }, "r549": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918631-209977" }, "r55": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669625-108580" }, "r550": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121603541&loc=SL77918643-209977" }, "r551": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918666-209980" }, "r552": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980" }, "r553": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980" }, "r554": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(1)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980" }, "r555": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(3)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980" }, "r556": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(g)(4)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980" }, "r557": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980" }, "r558": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980" }, "r559": { "Name": "Accounting Standards Codification", "Paragraph": "53", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971" }, "r56": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=SL7669625-108580" }, "r560": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "20", "Topic": "842", "URI": "http://asc.fasb.org/subtopic&trid=77888251" }, "r561": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864" }, "r562": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864" }, "r563": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864" }, "r564": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864" }, "r565": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39599-107864" }, "r566": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864" }, "r567": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "850", "URI": "http://asc.fasb.org/extlink&oid=6457730&loc=d3e39691-107864" }, "r568": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "850", "URI": "http://asc.fasb.org/topic&trid=2122745" }, "r569": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109221007&loc=SL6226446-111709" }, "r57": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121641772&loc=d3e557-108580" }, "r570": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(2)(i)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719" }, "r571": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(2)(ii)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719" }, "r572": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719" }, "r573": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719" }, "r574": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719" }, "r575": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719" }, "r576": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719" }, "r577": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719" }, "r578": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719" }, "r579": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107207-111719" }, "r58": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=116657188&loc=SL116659661-227067" }, "r580": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719" }, "r581": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719" }, "r582": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719" }, "r583": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719" }, "r584": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719" }, "r585": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "25", "SubTopic": "30", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109249708&loc=d3e113105-111724" }, "r586": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728" }, "r587": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729" }, "r588": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746" }, "r589": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746" }, "r59": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=121640130&loc=d3e1436-108581" }, "r590": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746" }, "r591": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(4)(i)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746" }, "r592": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746" }, "r593": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746" }, "r594": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746" }, "r595": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(4)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746" }, "r596": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(5)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746" }, "r597": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(6)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746" }, "r598": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(a)(7)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746" }, "r599": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(b)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746" }, "r6": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(13))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r60": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(1)(e))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868656-224227" }, "r600": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(e)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746" }, "r601": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(e)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746" }, "r602": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Subparagraph": "(e)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=116651436&loc=d3e122739-111746" }, "r603": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "910", "URI": "http://asc.fasb.org/extlink&oid=119991564&loc=SL119991595-234733" }, "r604": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 11.L)", "Topic": "924", "URI": "http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856" }, "r605": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "926", "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079" }, "r606": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "926", "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079" }, "r607": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "926", "URI": "http://asc.fasb.org/extlink&oid=120154821&loc=SL120154904-197079" }, "r608": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "05", "SubTopic": "20", "Topic": "940", "URI": "http://asc.fasb.org/extlink&oid=68070981&loc=d3e40544-110947" }, "r609": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "940", "URI": "http://asc.fasb.org/subtopic&trid=2176304" }, "r61": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(210.5-03(11))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227" }, "r610": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "210", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=117340910&loc=d3e59706-112781" }, "r611": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "210", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116631393&loc=SL116631396-227033" }, "r612": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(1))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r613": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(10))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r614": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(11))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r615": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(15)(2))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r616": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(15))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r617": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(16))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r618": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(23))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r619": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(6))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r62": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(12))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227" }, "r620": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(7)(e)(1)(i))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r621": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.1,2,3)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r622": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.10(4))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r623": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.12)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r624": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.13(1))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r625": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.13(3)(a))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r626": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.13(a))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r627": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.13,16)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r628": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.15)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r629": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.2)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r63": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(20))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227" }, "r630": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.3)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r631": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.7(e))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r632": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.7)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878" }, "r633": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(13)(f))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r634": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(13))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r635": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(22))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r636": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(23))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r637": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(26))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r638": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(27))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r639": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.1)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r64": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(21))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227" }, "r640": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.1-5)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r641": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.10)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r642": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.11)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r643": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.12)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r644": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.13(a),(b))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r645": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.13(h))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r646": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.13)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r647": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.14(b))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r648": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.14)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r649": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.2)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r65": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(24))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227" }, "r650": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.4)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r651": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.6)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r652": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.8)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r653": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.9)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260" }, "r654": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "230", "Subparagraph": "(b)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=121551529&loc=d3e60009-112784" }, "r655": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "235", "Subparagraph": "(SX 210.9-05(b)(2))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884" }, "r656": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Subparagraph": "(b)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=d3e62557-112803" }, "r657": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=d3e62557-112803" }, "r658": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=d3e62586-112803" }, "r659": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Subparagraph": "(a)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=SL120269850-112803" }, "r66": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(25))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227" }, "r660": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Subparagraph": "(b)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=SL120269850-112803" }, "r661": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Subparagraph": "(c)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=SL120269850-112803" }, "r662": { "Name": "Accounting Standards Codification", "Paragraph": "3A", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Subparagraph": "(d)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=SL120269850-112803" }, "r663": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=120252992&loc=d3e62652-112803" }, "r664": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/subtopic&trid=2209399" }, "r665": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "405", "Subparagraph": "(c)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116652737&loc=d3e64164-112818" }, "r666": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "405", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=116652737&loc=d3e64164-112818" }, "r667": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "470", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822" }, "r668": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "470", "Subparagraph": "(b)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823" }, "r669": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "470", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823" }, "r67": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(4))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227" }, "r670": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Subparagraph": "(a)(1)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826" }, "r671": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Subparagraph": "(a)(2)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826" }, "r672": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Subparagraph": "(b)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826" }, "r673": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Subparagraph": "(c)(1)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826" }, "r674": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Subparagraph": "(c)(2)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826" }, "r675": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Subparagraph": "(e)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826" }, "r676": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=SL5958569-112826" }, "r677": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826" }, "r678": { "Name": "Accounting Standards Codification", "Paragraph": "1D", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=SL5958573-112826" }, "r679": { "Name": "Accounting Standards Codification", "Paragraph": "1F", "Publisher": "FASB", "Section": "50", "SubTopic": "505", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=117337116&loc=SL5958575-112826" }, "r68": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(b)(4))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227" }, "r680": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "942", "URI": "http://asc.fasb.org/topic&trid=2209208" }, "r681": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(15)(b)(2))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910" }, "r682": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(16)(a))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910" }, "r683": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(10))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910" }, "r684": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(12))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910" }, "r685": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(15))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910" }, "r686": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(23)(a)(3))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910" }, "r687": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910" }, "r688": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(25))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910" }, "r689": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(8))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910" }, "r69": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.3)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227" }, "r690": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(10))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263" }, "r691": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(18))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263" }, "r692": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(19))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263" }, "r693": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(22))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263" }, "r694": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(23))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263" }, "r695": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(4))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263" }, "r696": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(9))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263" }, "r697": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "310", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121581245&loc=d3e21286-158488" }, "r698": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "310", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121581245&loc=d3e21310-158488" }, "r699": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "310", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=117337389&loc=d3e21493-158490" }, "r7": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(14))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r70": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.6)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227" }, "r700": { "Name": "Accounting Standards Codification", "Paragraph": "4H", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=116884468&loc=SL65671331-158438" }, "r701": { "Name": "Accounting Standards Codification", "Paragraph": "7A", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Subparagraph": "(d)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121643868&loc=SL117782755-158439" }, "r702": { "Name": "Accounting Standards Codification", "Paragraph": "13H", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Subparagraph": "(a)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117783719-158441" }, "r703": { "Name": "Accounting Standards Codification", "Paragraph": "29F", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121639165&loc=SL117819544-158441" }, "r704": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(a)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r705": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(b)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r706": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(e)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r707": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(f)(1)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r708": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(f)(2)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r709": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(g)(1)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r71": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.7(a))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227" }, "r710": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(g)(2)(i)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r711": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(g)(2)(ii)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r712": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(g)(2)(iii)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r713": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(g)(2)(iv)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r714": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(h)(1)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r715": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "65", "SubTopic": "40", "Subparagraph": "(h)(2)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641" }, "r716": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(e)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473" }, "r717": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "220", "Subparagraph": "(k)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=118262090&loc=SL114874205-224268" }, "r718": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.6-07.2(a),(b),(c),(d))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401555&loc=SL114874292-224272" }, "r719": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12.6(c))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611133-123010" }, "r72": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "220", "URI": "http://asc.fasb.org/topic&trid=2134417" }, "r720": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 1))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010" }, "r721": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 6))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010" }, "r722": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12B(Column B)(Footnote 7))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010" }, "r723": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 1))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010" }, "r724": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 6))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010" }, "r725": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 7))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010" }, "r726": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 1))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010" }, "r727": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 6))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010" }, "r728": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12B(Column D)(Footnote 7))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010" }, "r729": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12B(Footnote 11(c)))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611197-123010" }, "r73": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3151-108585" }, "r730": { "Name": "Accounting Standards Codification", "Paragraph": "5D", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-13D(Column B)(Footnote 2))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=SL120429264-123010" }, "r731": { "Name": "Accounting Standards Codification", "Paragraph": "5D", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-13D(Column C)(Footnote 2))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=SL120429264-123010" }, "r732": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-15(Column A))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010" }, "r733": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-15(Column B))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010" }, "r734": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-15(Column C))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010" }, "r735": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-15(Column D))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=120401592&loc=d3e611379-123010" }, "r736": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "946", "URI": "http://asc.fasb.org/subtopic&trid=2324412" }, "r737": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "948", "URI": "http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998" }, "r738": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "948", "URI": "http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998" }, "r739": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "310", "Topic": "948", "URI": "http://asc.fasb.org/extlink&oid=120238483&loc=d3e48678-111004" }, "r74": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585" }, "r740": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "740", "Topic": "954", "URI": "http://asc.fasb.org/extlink&oid=6491622&loc=d3e9504-115650" }, "r741": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "360", "Subparagraph": "(d)", "Topic": "958", "URI": "http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916" }, "r742": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "360", "Topic": "958", "URI": "http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916" }, "r743": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "360", "Topic": "958", "URI": "http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916" }, "r744": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "360", "Subparagraph": "(SX 210.12-28(Footnote 4))", "Topic": "970", "URI": "http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024" }, "r745": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b" }, "r746": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "d1-1" }, "r747": { "Name": "Form 10-K", "Number": "249", "Publisher": "SEC", "Section": "310" }, "r748": { "Name": "Form 20-F", "Number": "249", "Publisher": "SEC", "Section": "220", "Subsection": "f" }, "r749": { "Name": "Form 40-F", "Number": "249", "Publisher": "SEC", "Section": "240", "Subsection": "f" }, "r75": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585" }, "r750": { "Name": "Forms 10-K, 10-Q, 20-F", "Number": "240", "Publisher": "SEC", "Section": "13", "Subsection": "a-1" }, "r751": { "Name": "Regulation 12B", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b-2" }, "r752": { "Name": "Regulation S-T", "Number": "232", "Publisher": "SEC", "Section": "405" }, "r753": { "Footnote": "4", "Name": "Regulation S-X (SX)", "Number": "210", "Publisher": "SEC", "Section": "12", "Subsection": "28" }, "r754": { "Name": "Regulation S-X (SX)", "Number": "210", "Paragraph": "(a)", "Publisher": "SEC", "Section": "12", "Subsection": "04" }, "r755": { "Name": "Regulation S-X (SX)", "Number": "210", "Paragraph": "a", "Publisher": "SEC", "Section": "12", "Subsection": "04" }, "r756": { "Name": "Regulation S-X (SX)", "Number": "210", "Paragraph": "i", "Publisher": "SEC", "Section": "3", "Subsection": "10" }, "r76": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585" }, "r77": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585" }, "r78": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3367-108585" }, "r79": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3000-108585" }, "r8": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(17))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r80": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3461-108585" }, "r81": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585" }, "r82": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585" }, "r83": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585" }, "r84": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585" }, "r85": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585" }, "r86": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585" }, "r87": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585" }, "r88": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585" }, "r89": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4273-108586" }, "r9": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(22))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682" }, "r90": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=121583591&loc=d3e4297-108586" }, "r91": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790" }, "r92": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=84158767&loc=d3e18823-107790" }, "r93": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(g)(1)(ii))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" }, "r94": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(h))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" }, "r95": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(k)(1))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" }, "r96": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(e))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" }, "r97": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(e),(f))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" }, "r98": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(h)(1)(i))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" }, "r99": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(k))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690" } }, "version": "2.1" }