3.10.0.1 html 854 789 1 true 159 0 false 4 false false R1.htm 0001000 - Document - Document and Entity Information Sheet http://www.tcfbank.com/role/DocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 1001000 - Statement - Consolidated Statements of Financial Condition Sheet http://www.tcfbank.com/role/ConsolidatedStatementsOfFinancialCondition Consolidated Statements of Financial Condition Statements 2 false false R3.htm 1001501 - Statement - Consolidated Statements of Financial Condition (Parenthetical) Sheet http://www.tcfbank.com/role/ConsolidatedStatementsOfFinancialConditionParenthetical Consolidated Statements of Financial Condition (Parenthetical) Statements 3 false false R4.htm 1002000 - Statement - Consolidated Statements of Income Sheet http://www.tcfbank.com/role/ConsolidatedStatementsOfIncome Consolidated Statements of Income Statements 4 false false R5.htm 1003000 - Statement - Consolidated Statements of Comprehensive Income Sheet http://www.tcfbank.com/role/ConsolidatedStatementsOfComprehensiveIncome Consolidated Statements of Comprehensive Income Statements 5 false false R6.htm 1004000 - Statement - Consolidated Statements of Equity Sheet http://www.tcfbank.com/role/ConsolidatedStatementsOfEquity Consolidated Statements of Equity Statements 6 false false R7.htm 1004501 - Statement - Consolidated Statements of Equity (Parenthetical) Sheet http://www.tcfbank.com/role/ConsolidatedStatementsOfEquityParenthetical Consolidated Statements of Equity (Parenthetical) Statements 7 false false R8.htm 1005000 - Statement - Consolidated Statements of Cash Flows Sheet http://www.tcfbank.com/role/ConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 8 false false R9.htm 2101100 - Disclosure - Basis of Presentation Sheet http://www.tcfbank.com/role/BasisOfPresentation Basis of Presentation Notes 9 false false R10.htm 2102100 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.tcfbank.com/role/SummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 10 false false R11.htm 2103100 - Disclosure - Cash and Due from Banks Sheet http://www.tcfbank.com/role/CashAndDueFromBanks Cash and Due from Banks Notes 11 false false R12.htm 2104100 - Disclosure - Investments Sheet http://www.tcfbank.com/role/Investments Investments Notes 12 false false R13.htm 2105100 - Disclosure - Debt Securities Available for Sale and Debt Securities Held to Maturity Sheet http://www.tcfbank.com/role/DebtSecuritiesAvailableForSaleAndDebtSecuritiesHeldToMaturity Debt Securities Available for Sale and Debt Securities Held to Maturity Notes 13 false false R14.htm 2106100 - Disclosure - Loans and Leases Sheet http://www.tcfbank.com/role/LoansAndLeases Loans and Leases Notes 14 false false R15.htm 2107100 - Disclosure - Allowance for Loan and Lease Losses and Credit Quality Information Sheet http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformation Allowance for Loan and Lease Losses and Credit Quality Information Notes 15 false false R16.htm 2108100 - Disclosure - Premises and Equipment, Net Sheet http://www.tcfbank.com/role/PremisesAndEquipmentNet Premises and Equipment, Net Notes 16 false false R17.htm 2109100 - Disclosure - Goodwill and Other Intangible Assets Sheet http://www.tcfbank.com/role/GoodwillAndOtherIntangibleAssets Goodwill and Other Intangible Assets Notes 17 false false R18.htm 2110100 - Disclosure - Investments in Affordable Housing Limited Liability Entities Sheet http://www.tcfbank.com/role/InvestmentsInAffordableHousingLimitedLiabilityEntities Investments in Affordable Housing Limited Liability Entities Notes 18 false false R19.htm 2111100 - Disclosure - Deposits Sheet http://www.tcfbank.com/role/Deposits Deposits Notes 19 false false R20.htm 2112100 - Disclosure - Short-term Borrowings Sheet http://www.tcfbank.com/role/ShortTermBorrowings Short-term Borrowings Notes 20 false false R21.htm 2113100 - Disclosure - Long-term Borrowings Sheet http://www.tcfbank.com/role/LongTermBorrowings Long-term Borrowings Notes 21 false false R22.htm 2114100 - Disclosure - Income Taxes Sheet http://www.tcfbank.com/role/IncomeTaxes Income Taxes Notes 22 false false R23.htm 2115100 - Disclosure - Equity Sheet http://www.tcfbank.com/role/Equity Equity Notes 23 false false R24.htm 2116100 - Disclosure - Regulatory Capital Requirements Sheet http://www.tcfbank.com/role/RegulatoryCapitalRequirements Regulatory Capital Requirements Notes 24 false false R25.htm 2117100 - Disclosure - Stock Compensation Sheet http://www.tcfbank.com/role/StockCompensation Stock Compensation Notes 25 false false R26.htm 2118100 - Disclosure - Employee Benefit Plans Sheet http://www.tcfbank.com/role/EmployeeBenefitPlans Employee Benefit Plans Notes 26 false false R27.htm 2119100 - Disclosure - Financial Instruments with Off-Balance Sheet Risk Sheet http://www.tcfbank.com/role/FinancialInstrumentsWithOffBalanceSheetRisk Financial Instruments with Off-Balance Sheet Risk Notes 27 false false R28.htm 2120100 - Disclosure - Derivative Instruments Sheet http://www.tcfbank.com/role/DerivativeInstruments Derivative Instruments Notes 28 false false R29.htm 2121100 - Disclosure - Fair Values Disclosures Sheet http://www.tcfbank.com/role/FairValuesDisclosures Fair Values Disclosures Notes 29 false false R30.htm 2122100 - Disclosure - Earnings Per Common Share Sheet http://www.tcfbank.com/role/EarningsPerCommonShare Earnings Per Common Share Notes 30 false false R31.htm 2123100 - Disclosure - Other Non-Interest Expense Sheet http://www.tcfbank.com/role/OtherNonInterestExpense Other Non-Interest Expense Notes 31 false false R32.htm 2124100 - Disclosure - Business Segments Sheet http://www.tcfbank.com/role/BusinessSegments Business Segments Notes 32 false false R33.htm 2125100 - Disclosure - Parent Company Financial Information Sheet http://www.tcfbank.com/role/ParentCompanyFinancialInformation Parent Company Financial Information Notes 33 false false R34.htm 2126100 - Disclosure - Litigation Contingencies Sheet http://www.tcfbank.com/role/LitigationContingencies Litigation Contingencies Notes 34 false false R35.htm 2127100 - Disclosure - Accumulated Other Comprehensive Income (Loss) Sheet http://www.tcfbank.com/role/AccumulatedOtherComprehensiveIncomeLoss Accumulated Other Comprehensive Income (Loss) Notes 35 false false R36.htm 2128100 - Disclosure - Pending Merger with Chemical Financial Corporation Sheet http://www.tcfbank.com/role/PendingMergerWithChemicalFinancialCorporation Pending Merger with Chemical Financial Corporation Notes 36 false false R37.htm 2201201 - Disclosure - Basis of Presentation (Policies) Sheet http://www.tcfbank.com/role/BasisOfPresentationPolicies Basis of Presentation (Policies) Policies http://www.tcfbank.com/role/SummaryOfSignificantAccountingPolicies 37 false false R38.htm 2202201 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.tcfbank.com/role/SummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.tcfbank.com/role/SummaryOfSignificantAccountingPolicies 38 false false R39.htm 2304301 - Disclosure - Investments (Tables) Sheet http://www.tcfbank.com/role/InvestmentsTables Investments (Tables) Tables http://www.tcfbank.com/role/Investments 39 false false R40.htm 2305301 - Disclosure - Debt Securities Available for Sale and Debt Securities Held to Maturity (Tables) Sheet http://www.tcfbank.com/role/DebtSecuritiesAvailableForSaleAndDebtSecuritiesHeldToMaturityTables Debt Securities Available for Sale and Debt Securities Held to Maturity (Tables) Tables http://www.tcfbank.com/role/DebtSecuritiesAvailableForSaleAndDebtSecuritiesHeldToMaturity 40 false false R41.htm 2306301 - Disclosure - Loans and Leases (Tables) Sheet http://www.tcfbank.com/role/LoansAndLeasesTables Loans and Leases (Tables) Tables http://www.tcfbank.com/role/LoansAndLeases 41 false false R42.htm 2307301 - Disclosure - Allowance for Loan and Lease Losses and Credit Quality Information (Tables) Sheet http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformationTables Allowance for Loan and Lease Losses and Credit Quality Information (Tables) Tables http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformation 42 false false R43.htm 2308301 - Disclosure - Premises and Equipment, Net (Tables) Sheet http://www.tcfbank.com/role/PremisesAndEquipmentNetTables Premises and Equipment, Net (Tables) Tables http://www.tcfbank.com/role/PremisesAndEquipmentNet 43 false false R44.htm 2309301 - Disclosure - Goodwill and Other Intangible Assets (Tables) Sheet http://www.tcfbank.com/role/GoodwillAndOtherIntangibleAssetsTables Goodwill and Other Intangible Assets (Tables) Tables http://www.tcfbank.com/role/GoodwillAndOtherIntangibleAssets 44 false false R45.htm 2310301 - Disclosure - Investments in Affordable Housing Limited Liability Entities (Tables) Sheet http://www.tcfbank.com/role/InvestmentsInAffordableHousingLimitedLiabilityEntitiesTables Investments in Affordable Housing Limited Liability Entities (Tables) Tables http://www.tcfbank.com/role/InvestmentsInAffordableHousingLimitedLiabilityEntities 45 false false R46.htm 2311301 - Disclosure - Deposits (Tables) Sheet http://www.tcfbank.com/role/DepositsTables Deposits (Tables) Tables http://www.tcfbank.com/role/Deposits 46 false false R47.htm 2312301 - Disclosure - Short-term Borrowings (Tables) Sheet http://www.tcfbank.com/role/ShortTermBorrowingsTables Short-term Borrowings (Tables) Tables http://www.tcfbank.com/role/ShortTermBorrowings 47 false false R48.htm 2313301 - Disclosure - Long-term Borrowings (Tables) Sheet http://www.tcfbank.com/role/LongTermBorrowingsTables Long-term Borrowings (Tables) Tables http://www.tcfbank.com/role/LongTermBorrowings 48 false false R49.htm 2314301 - Disclosure - Income Taxes (Tables) Sheet http://www.tcfbank.com/role/IncomeTaxesTables Income Taxes (Tables) Tables http://www.tcfbank.com/role/IncomeTaxes 49 false false R50.htm 2315301 - Disclosure - Equity (Tables) Sheet http://www.tcfbank.com/role/EquityTables Equity (Tables) Tables http://www.tcfbank.com/role/Equity 50 false false R51.htm 2316301 - Disclosure - Regulatory Capital Requirements (Tables) Sheet http://www.tcfbank.com/role/RegulatoryCapitalRequirementsTables Regulatory Capital Requirements (Tables) Tables http://www.tcfbank.com/role/RegulatoryCapitalRequirements 51 false false R52.htm 2317301 - Disclosure - Stock Compensation (Tables) Sheet http://www.tcfbank.com/role/StockCompensationTables Stock Compensation (Tables) Tables http://www.tcfbank.com/role/StockCompensation 52 false false R53.htm 2318301 - Disclosure - Employee Benefit Plans (Tables) Sheet http://www.tcfbank.com/role/EmployeeBenefitPlansTables Employee Benefit Plans (Tables) Tables http://www.tcfbank.com/role/EmployeeBenefitPlans 53 false false R54.htm 2319301 - Disclosure - Financial Instruments with Off-Balance Sheet Risk (Tables) Sheet http://www.tcfbank.com/role/FinancialInstrumentsWithOffBalanceSheetRiskTables Financial Instruments with Off-Balance Sheet Risk (Tables) Tables http://www.tcfbank.com/role/FinancialInstrumentsWithOffBalanceSheetRisk 54 false false R55.htm 2320301 - Disclosure - Derivative Instruments (Tables) Sheet http://www.tcfbank.com/role/DerivativeInstrumentsTables Derivative Instruments (Tables) Tables http://www.tcfbank.com/role/DerivativeInstruments 55 false false R56.htm 2321301 - Disclosure - Fair Values Disclosures (Tables) Sheet http://www.tcfbank.com/role/FairValuesDisclosuresTables Fair Values Disclosures (Tables) Tables http://www.tcfbank.com/role/FairValuesDisclosures 56 false false R57.htm 2322301 - Disclosure - Earnings Per Common Share (Tables) Sheet http://www.tcfbank.com/role/EarningsPerCommonShareTables Earnings Per Common Share (Tables) Tables http://www.tcfbank.com/role/EarningsPerCommonShare 57 false false R58.htm 2323301 - Disclosure - Other Non-Interest Expense (Tables) Sheet http://www.tcfbank.com/role/OtherNonInterestExpenseTables Other Non-Interest Expense (Tables) Tables http://www.tcfbank.com/role/OtherNonInterestExpense 58 false false R59.htm 2324301 - Disclosure - Business Segments (Tables) Sheet http://www.tcfbank.com/role/BusinessSegmentsTables Business Segments (Tables) Tables http://www.tcfbank.com/role/BusinessSegments 59 false false R60.htm 2325301 - Disclosure - Parent Company Financial Information (Tables) Sheet http://www.tcfbank.com/role/ParentCompanyFinancialInformationTables Parent Company Financial Information (Tables) Tables http://www.tcfbank.com/role/ParentCompanyFinancialInformation 60 false false R61.htm 2327301 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables) Sheet http://www.tcfbank.com/role/AccumulatedOtherComprehensiveIncomeLossTables Accumulated Other Comprehensive Income (Loss) (Tables) Tables http://www.tcfbank.com/role/AccumulatedOtherComprehensiveIncomeLoss 61 false false R62.htm 2401402 - Disclosure - Basis of Presentation (Details) Sheet http://www.tcfbank.com/role/BasisOfPresentationDetails Basis of Presentation (Details) Details http://www.tcfbank.com/role/BasisOfPresentationPolicies 62 false false R63.htm 2402402 - Disclosure - Summary of Significant Accounting Policies - Summary of Significant Accounting Policies (Details) Sheet http://www.tcfbank.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesDetails Summary of Significant Accounting Policies - Summary of Significant Accounting Policies (Details) Details 63 false false R64.htm 2402403 - Disclosure - Summary of Significant Accounting Policies - Accounting Pronouncements (Details) Sheet http://www.tcfbank.com/role/SummaryOfSignificantAccountingPoliciesAccountingPronouncementsDetails Summary of Significant Accounting Policies - Accounting Pronouncements (Details) Details 64 false false R65.htm 2403401 - Disclosure - Cash and Due from Banks - Cash and Due from Banks (Details) Sheet http://www.tcfbank.com/role/CashAndDueFromBanksCashAndDueFromBanksDetails Cash and Due from Banks - Cash and Due from Banks (Details) Details 65 false false R66.htm 2404402 - Disclosure - Investments - Investments (Details) Sheet http://www.tcfbank.com/role/InvestmentsInvestmentsDetails Investments - Investments (Details) Details 66 false false R67.htm 2405402 - Disclosure - Debt Securities Available for Sale and Debt Securities Held to Maturity - Debt Securities Available for Sale and Debt Securities Held to Maturity (Details) Sheet http://www.tcfbank.com/role/DebtSecuritiesAvailableForSaleAndDebtSecuritiesHeldToMaturityDebtSecuritiesAvailableForSaleAndDebtSecuritiesHeldToMaturityDetails Debt Securities Available for Sale and Debt Securities Held to Maturity - Debt Securities Available for Sale and Debt Securities Held to Maturity (Details) Details 67 false false R68.htm 2405403 - Disclosure - Debt Securities Available for Sale and Debt Securities Held to Maturity - Gross Unrealized Losses and Fair Value of Debt Securities Available for Sale and Debt Securities Held to Maturity (Details) Sheet http://www.tcfbank.com/role/DebtSecuritiesAvailableForSaleAndDebtSecuritiesHeldToMaturityGrossUnrealizedLossesAndFairValueOfDebtSecuritiesAvailableForSaleAndDebtSecuritiesHeldToMaturityDetails Debt Securities Available for Sale and Debt Securities Held to Maturity - Gross Unrealized Losses and Fair Value of Debt Securities Available for Sale and Debt Securities Held to Maturity (Details) Details 68 false false R69.htm 2405404 - Disclosure - Debt Securities Available for Sale and Debt Securities Held to Maturity - Amortized Cost and Fair Value of Debt Securities Available for Sale and Debt Securities Held to Maturity (Details) Sheet http://www.tcfbank.com/role/DebtSecuritiesAvailableForSaleAndDebtSecuritiesHeldToMaturityAmortizedCostAndFairValueOfDebtSecuritiesAvailableForSaleAndDebtSecuritiesHeldToMaturityDetails Debt Securities Available for Sale and Debt Securities Held to Maturity - Amortized Cost and Fair Value of Debt Securities Available for Sale and Debt Securities Held to Maturity (Details) Details 69 false false R70.htm 2405405 - Disclosure - Debt Securities Available for Sale and Debt Securities Held to Maturity - Interest Income Attributable to Debt Securities Available for Sale (Details) Sheet http://www.tcfbank.com/role/DebtSecuritiesAvailableForSaleAndDebtSecuritiesHeldToMaturityInterestIncomeAttributableToDebtSecuritiesAvailableForSaleDetails Debt Securities Available for Sale and Debt Securities Held to Maturity - Interest Income Attributable to Debt Securities Available for Sale (Details) Details 70 false false R71.htm 2406402 - Disclosure - Loans and Leases - Loans and Leases Balances (Details) Sheet http://www.tcfbank.com/role/LoansAndLeasesLoansAndLeasesBalancesDetails Loans and Leases - Loans and Leases Balances (Details) Details 71 false false R72.htm 2406403 - Disclosure - Loans and Leases - Loan Sales (Details) Sheet http://www.tcfbank.com/role/LoansAndLeasesLoanSalesDetails Loans and Leases - Loan Sales (Details) Details 72 false false R73.htm 2406404 - Disclosure - Loans and Leases - Interest-only Strips and Contractual Liabilities Related to Loan Sales (Details) Sheet http://www.tcfbank.com/role/LoansAndLeasesInterestOnlyStripsAndContractualLiabilitiesRelatedToLoanSalesDetails Loans and Leases - Interest-only Strips and Contractual Liabilities Related to Loan Sales (Details) Details 73 false false R74.htm 2406405 - Disclosure - Loans and Leases - Leasing and Equipment Finance Portfolio (Details) Sheet http://www.tcfbank.com/role/LoansAndLeasesLeasingAndEquipmentFinancePortfolioDetails Loans and Leases - Leasing and Equipment Finance Portfolio (Details) Details 74 false false R75.htm 2406406 - Disclosure - Loans and Leases - Acquired Loans and Leases (Details) Sheet http://www.tcfbank.com/role/LoansAndLeasesAcquiredLoansAndLeasesDetails Loans and Leases - Acquired Loans and Leases (Details) Details 75 false false R76.htm 2407402 - Disclosure - Allowance for Loan and Lease Losses and Credit Quality Information - Rollforwards of the Allowance for Loan and Lease Losses (Details) Sheet http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformationRollforwardsOfAllowanceForLoanAndLeaseLossesDetails Allowance for Loan and Lease Losses and Credit Quality Information - Rollforwards of the Allowance for Loan and Lease Losses (Details) Details 76 false false R77.htm 2407403 - Disclosure - Allowance for Loan and Lease Losses and Credit Quality Information - Allowance for Loan and Lease Losses and Balances Outstanding by Allowance Methodology (Details) Sheet http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformationAllowanceForLoanAndLeaseLossesAndBalancesOutstandingByAllowanceMethodologyDetails Allowance for Loan and Lease Losses and Credit Quality Information - Allowance for Loan and Lease Losses and Balances Outstanding by Allowance Methodology (Details) Details 77 false false R78.htm 2407404 - Disclosure - Allowance for Loan and Lease Losses and Credit Quality Information - Accruing and Non-accrual Loans and Leases (Details) Sheet http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformationAccruingAndNonAccrualLoansAndLeasesDetails Allowance for Loan and Lease Losses and Credit Quality Information - Accruing and Non-accrual Loans and Leases (Details) Details 78 false false R79.htm 2407405 - Disclosure - Allowance for Loan and Lease Losses and Credit Quality Information - Interest Income for Loans and Leases in Non-accrual Status (Details) Sheet http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformationInterestIncomeForLoansAndLeasesInNonAccrualStatusDetails Allowance for Loan and Lease Losses and Credit Quality Information - Interest Income for Loans and Leases in Non-accrual Status (Details) Details 79 false false R80.htm 2407406 - Disclosure - Allowance for Loan and Lease Losses and Credit Quality Information - Consumer Real Estate Loans to Customers in Bankruptcy (Details) Sheet http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformationConsumerRealEstateLoansToCustomersInBankruptcyDetails Allowance for Loan and Lease Losses and Credit Quality Information - Consumer Real Estate Loans to Customers in Bankruptcy (Details) Details 80 false false R81.htm 2407407 - Disclosure - Allowance for Loan and Lease Losses and Credit Quality Information - Loan Modifications to Borrowers with Financial Difficulties (Details) Sheet http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformationLoanModificationsToBorrowersWithFinancialDifficultiesDetails Allowance for Loan and Lease Losses and Credit Quality Information - Loan Modifications to Borrowers with Financial Difficulties (Details) Details 81 false false R82.htm 2407408 - Disclosure - Allowance for Loan and Lease Losses and Credit Quality Information - Modified TDR Loan Balances that Defaulted During the Period (Details) Sheet http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformationModifiedTdrLoanBalancesThatDefaultedDuringPeriodDetails Allowance for Loan and Lease Losses and Credit Quality Information - Modified TDR Loan Balances that Defaulted During the Period (Details) Details 82 false false R83.htm 2407409 - Disclosure - Allowance for Loan and Lease Losses and Credit Quality Information - Impaired Loans (Details) Sheet http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformationImpairedLoansDetails Allowance for Loan and Lease Losses and Credit Quality Information - Impaired Loans (Details) Details 83 false false R84.htm 2407410 - Disclosure - Allowance for Loan and Lease Losses and Credit Quality Information - Other Real Estate Owned and Repossessed and Returned Assets (Details) Sheet http://www.tcfbank.com/role/AllowanceForLoanAndLeaseLossesAndCreditQualityInformationOtherRealEstateOwnedAndRepossessedAndReturnedAssetsDetails Allowance for Loan and Lease Losses and Credit Quality Information - Other Real Estate Owned and Repossessed and Returned Assets (Details) Details 84 false false R85.htm 2408402 - Disclosure - Premises and Equipment, Net - Premises and Equipment, Net (Details) Sheet http://www.tcfbank.com/role/PremisesAndEquipmentNetPremisesAndEquipmentNetDetails Premises and Equipment, Net - Premises and Equipment, Net (Details) Details 85 false false R86.htm 2409402 - Disclosure - Goodwill and Other Intangible Assets - Goodwill, Net (Details) Sheet http://www.tcfbank.com/role/GoodwillAndOtherIntangibleAssetsGoodwillNetDetails Goodwill and Other Intangible Assets - Goodwill, Net (Details) Details 86 false false R87.htm 2409403 - Disclosure - Goodwill and Other Intangible Assets - Other Intangible Assets, Net (Details) Sheet http://www.tcfbank.com/role/GoodwillAndOtherIntangibleAssetsOtherIntangibleAssetsNetDetails Goodwill and Other Intangible Assets - Other Intangible Assets, Net (Details) Details 87 false false R88.htm 2409404 - Disclosure - Goodwill and Other Intangible Assets - Business Combinations (Details) Sheet http://www.tcfbank.com/role/GoodwillAndOtherIntangibleAssetsBusinessCombinationsDetails Goodwill and Other Intangible Assets - Business Combinations (Details) Details 88 false false R89.htm 2410402 - Disclosure - Investments in Affordable Housing Limited Liability Entities - Investments in Affordable Housing Limited Liability Entities (Details) Sheet http://www.tcfbank.com/role/InvestmentsInAffordableHousingLimitedLiabilityEntitiesInvestmentsInAffordableHousingLimitedLiabilityEntitiesDetails Investments in Affordable Housing Limited Liability Entities - Investments in Affordable Housing Limited Liability Entities (Details) Details 89 false false R90.htm 2411402 - Disclosure - Deposits - Deposits (Details) Sheet http://www.tcfbank.com/role/DepositsDepositsDetails Deposits - Deposits (Details) Details 90 false false R91.htm 2411403 - Disclosure - Deposits - Annual Maturities of Certificates of Deposit (Details) Sheet http://www.tcfbank.com/role/DepositsAnnualMaturitiesOfCertificatesOfDepositDetails Deposits - Annual Maturities of Certificates of Deposit (Details) Details 91 false false R92.htm 2412402 - Disclosure - Short-term Borrowings - Short-term Borrowings (Details) Sheet http://www.tcfbank.com/role/ShortTermBorrowingsShortTermBorrowingsDetails Short-term Borrowings - Short-term Borrowings (Details) Details 92 false false R93.htm 2413402 - Disclosure - Long-term Borrowings - Long-term Borrowings (Details) Sheet http://www.tcfbank.com/role/LongTermBorrowingsLongTermBorrowingsDetails Long-term Borrowings - Long-term Borrowings (Details) Details 93 false false R94.htm 2414402 - Disclosure - Income Taxes - Income Tax Expense Components and Effective Tax Rate Reconciliation (Details) Sheet http://www.tcfbank.com/role/IncomeTaxesIncomeTaxExpenseComponentsAndEffectiveTaxRateReconciliationDetails Income Taxes - Income Tax Expense Components and Effective Tax Rate Reconciliation (Details) Details 94 false false R95.htm 2414403 - Disclosure - Income Taxes - Tax Reform and Unrecognized Tax Benefits (Details) Sheet http://www.tcfbank.com/role/IncomeTaxesTaxReformAndUnrecognizedTaxBenefitsDetails Income Taxes - Tax Reform and Unrecognized Tax Benefits (Details) Details 95 false false R96.htm 2414404 - Disclosure - Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details) Sheet http://www.tcfbank.com/role/IncomeTaxesDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details) Details 96 false false R97.htm 2415402 - Disclosure - Equity - Preferred Stock (Details) Sheet http://www.tcfbank.com/role/EquityPreferredStockDetails Equity - Preferred Stock (Details) Details 97 false false R98.htm 2415403 - Disclosure - Equity - Treasury Stock and Other (Details) Sheet http://www.tcfbank.com/role/EquityTreasuryStockAndOtherDetails Equity - Treasury Stock and Other (Details) Details 98 false false R99.htm 2415404 - Disclosure - Equity - Non-controlling Interest in Subsidiaries and Stock Warrants (Details) Sheet http://www.tcfbank.com/role/EquityNonControllingInterestInSubsidiariesAndStockWarrantsDetails Equity - Non-controlling Interest in Subsidiaries and Stock Warrants (Details) Details 99 false false R100.htm 2416402 - Disclosure - Regulatory Capital Requirements - Regulatory Capital Requirements (Details) Sheet http://www.tcfbank.com/role/RegulatoryCapitalRequirementsRegulatoryCapitalRequirementsDetails Regulatory Capital Requirements - Regulatory Capital Requirements (Details) Details 100 false false R101.htm 2417402 - Disclosure - Stock Compensation - Stock Compensation Information (Details) Sheet http://www.tcfbank.com/role/StockCompensationStockCompensationInformationDetails Stock Compensation - Stock Compensation Information (Details) Details 101 false false R102.htm 2417403 - Disclosure - Stock Compensation - Restricted Stock Award and Stock Option Transactions (Details) Sheet http://www.tcfbank.com/role/StockCompensationRestrictedStockAwardAndStockOptionTransactionsDetails Stock Compensation - Restricted Stock Award and Stock Option Transactions (Details) Details 102 false false R103.htm 2417404 - Disclosure - Stock Compensation - Deferred Compensation Plans (Details) Sheet http://www.tcfbank.com/role/StockCompensationDeferredCompensationPlansDetails Stock Compensation - Deferred Compensation Plans (Details) Details 103 false false R104.htm 2418402 - Disclosure - Employee Benefit Plans - Defined Contribution Plans (Details) Sheet http://www.tcfbank.com/role/EmployeeBenefitPlansDefinedContributionPlansDetails Employee Benefit Plans - Defined Contribution Plans (Details) Details 104 false false R105.htm 2418403 - Disclosure - Employee Benefit Plans - Pension Plan Funded Status (Details) Sheet http://www.tcfbank.com/role/EmployeeBenefitPlansPensionPlanFundedStatusDetails Employee Benefit Plans - Pension Plan Funded Status (Details) Details 105 false false R106.htm 2418404 - Disclosure - Employee Benefit Plans - Pension Plan Assets (Details) Sheet http://www.tcfbank.com/role/EmployeeBenefitPlansPensionPlanAssetsDetails Employee Benefit Plans - Pension Plan Assets (Details) Details 106 false false R107.htm 2418405 - Disclosure - Employee Benefit Plans - Pension Plan Assumptions & Contributions (Details) Sheet http://www.tcfbank.com/role/EmployeeBenefitPlansPensionPlanAssumptionsContributionsDetails Employee Benefit Plans - Pension Plan Assumptions & Contributions (Details) Details 107 false false R108.htm 2418406 - Disclosure - Employee Benefit Plans - Future Benefit Payments for the Pension Plan (Details) Sheet http://www.tcfbank.com/role/EmployeeBenefitPlansFutureBenefitPaymentsForPensionPlanDetails Employee Benefit Plans - Future Benefit Payments for the Pension Plan (Details) Details 108 false false R109.htm 2418407 - Disclosure - Employee Benefit Plans - Funded Status of the Postretirement Plan (Details) Sheet http://www.tcfbank.com/role/EmployeeBenefitPlansFundedStatusOfPostretirementPlanDetails Employee Benefit Plans - Funded Status of the Postretirement Plan (Details) Details 109 false false R110.htm 2418408 - Disclosure - Employee Benefit Plans - Net Periodic Benefit Plan (Income) Cost for the Postretirement Plan (Details) Sheet http://www.tcfbank.com/role/EmployeeBenefitPlansNetPeriodicBenefitPlanIncomeCostForPostretirementPlanDetails Employee Benefit Plans - Net Periodic Benefit Plan (Income) Cost for the Postretirement Plan (Details) Details 110 false false R111.htm 2418409 - Disclosure - Employee Benefit Plans - Postretirement Plan Assumptions (Details) Sheet http://www.tcfbank.com/role/EmployeeBenefitPlansPostretirementPlanAssumptionsDetails Employee Benefit Plans - Postretirement Plan Assumptions (Details) Details 111 false false R112.htm 2418410 - Disclosure - Employee Benefit Plans - Future Benefit Payments for the Postretirement Plan (Details) Sheet http://www.tcfbank.com/role/EmployeeBenefitPlansFutureBenefitPaymentsForPostretirementPlanDetails Employee Benefit Plans - Future Benefit Payments for the Postretirement Plan (Details) Details 112 false false R113.htm 2419402 - Disclosure - Financial Instruments with Off-Balance Sheet Risk - Financial Instruments with Off-Balance Sheet Risk (Details) Sheet http://www.tcfbank.com/role/FinancialInstrumentsWithOffBalanceSheetRiskFinancialInstrumentsWithOffBalanceSheetRiskDetails Financial Instruments with Off-Balance Sheet Risk - Financial Instruments with Off-Balance Sheet Risk (Details) Details 113 false false R114.htm 2420402 - Disclosure - Derivative Instruments - Derivative Instruments (Details) Sheet http://www.tcfbank.com/role/DerivativeInstrumentsDerivativeInstrumentsDetails Derivative Instruments - Derivative Instruments (Details) Details 114 false false R115.htm 2420403 - Disclosure - Derivative Instruments - Derivatives Gross Amounts Recognized and Offset (Details) Sheet http://www.tcfbank.com/role/DerivativeInstrumentsDerivativesGrossAmountsRecognizedAndOffsetDetails Derivative Instruments - Derivatives Gross Amounts Recognized and Offset (Details) Details 115 false false R116.htm 2420404 - Disclosure - Derivative Instruments - Derivatives Designated as Hedging Instruments (Details) Sheet http://www.tcfbank.com/role/DerivativeInstrumentsDerivativesDesignatedAsHedgingInstrumentsDetails Derivative Instruments - Derivatives Designated as Hedging Instruments (Details) Details 116 false false R117.htm 2420405 - Disclosure - Derivative Instruments - Derivatives Not Designated as Hedging Instruments (Details) Sheet http://www.tcfbank.com/role/DerivativeInstrumentsDerivativesNotDesignatedAsHedgingInstrumentsDetails Derivative Instruments - Derivatives Not Designated as Hedging Instruments (Details) Details 117 false false R118.htm 2421402 - Disclosure - Fair Values Disclosures - Valuation Methodologies of Assets and Liabilities at Fair Value (Details) Sheet http://www.tcfbank.com/role/FairValuesDisclosuresValuationMethodologiesOfAssetsAndLiabilitiesAtFairValueDetails Fair Values Disclosures - Valuation Methodologies of Assets and Liabilities at Fair Value (Details) Details 118 false false R119.htm 2421403 - Disclosure - Fair Values Disclosures - Assets and Liabilities Measured at Fair Value (Details) Sheet http://www.tcfbank.com/role/FairValuesDisclosuresAssetsAndLiabilitiesMeasuredAtFairValueDetails Fair Values Disclosures - Assets and Liabilities Measured at Fair Value (Details) Details 119 false false R120.htm 2421404 - Disclosure - Fair Values Disclosures - Changes in Level 3 Assets and Liabilities Measured at Fair Value (Details) Sheet http://www.tcfbank.com/role/FairValuesDisclosuresChangesInLevel3AssetsAndLiabilitiesMeasuredAtFairValueDetails Fair Values Disclosures - Changes in Level 3 Assets and Liabilities Measured at Fair Value (Details) Details 120 false false R121.htm 2421405 - Disclosure - Fair Values Disclosures - Fair Value Option (Details) Sheet http://www.tcfbank.com/role/FairValuesDisclosuresFairValueOptionDetails Fair Values Disclosures - Fair Value Option (Details) Details 121 false false R122.htm 2421406 - Disclosure - Fair Values Disclosures - Estimated Fair Value of Financial Instrument Assets, Liabilities, and Instruments with Off-Balance Sheet Risk (Details) Sheet http://www.tcfbank.com/role/FairValuesDisclosuresEstimatedFairValueOfFinancialInstrumentAssetsLiabilitiesAndInstrumentsWithOffBalanceSheetRiskDetails Fair Values Disclosures - Estimated Fair Value of Financial Instrument Assets, Liabilities, and Instruments with Off-Balance Sheet Risk (Details) Details 122 false false R123.htm 2422402 - Disclosure - Earnings Per Common Share - Computations of basic and diluted earnings per common share (Details) Sheet http://www.tcfbank.com/role/EarningsPerCommonShareComputationsOfBasicAndDilutedEarningsPerCommonShareDetails Earnings Per Common Share - Computations of basic and diluted earnings per common share (Details) Details 123 false false R124.htm 2422403 - Disclosure - Earnings Per Common Share - Antidilutive securities excluded from computation of earnings per common share (Details) Sheet http://www.tcfbank.com/role/EarningsPerCommonShareAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerCommonShareDetails Earnings Per Common Share - Antidilutive securities excluded from computation of earnings per common share (Details) Details 124 false false R125.htm 2423402 - Disclosure - Other Non-Interest Expense - Other Non-Interest Expense (Details) Sheet http://www.tcfbank.com/role/OtherNonInterestExpenseOtherNonInterestExpenseDetails Other Non-Interest Expense - Other Non-Interest Expense (Details) Details 125 false false R126.htm 2424402 - Disclosure - Business Segments - Business Segments (Details) Sheet http://www.tcfbank.com/role/BusinessSegmentsBusinessSegmentsDetails Business Segments - Business Segments (Details) Details 126 false false R127.htm 2425402 - Disclosure - Parent Company Financial Information - Condensed Statements of Financial Condition (Details) Sheet http://www.tcfbank.com/role/ParentCompanyFinancialInformationCondensedStatementsOfFinancialConditionDetails Parent Company Financial Information - Condensed Statements of Financial Condition (Details) Details 127 false false R128.htm 2425403 - Disclosure - Parent Company Financial Information - Condensed Statements of Income (Details) Sheet http://www.tcfbank.com/role/ParentCompanyFinancialInformationCondensedStatementsOfIncomeDetails Parent Company Financial Information - Condensed Statements of Income (Details) Details 128 false false R129.htm 2425404 - Disclosure - Parent Company Financial Information - Condensed Statements of Cash Flows (Details) Sheet http://www.tcfbank.com/role/ParentCompanyFinancialInformationCondensedStatementsOfCashFlowsDetails Parent Company Financial Information - Condensed Statements of Cash Flows (Details) Details 129 false false R130.htm 2426401 - Disclosure - Litigation Contingencies - Litigation Contingencies (Details) Sheet http://www.tcfbank.com/role/LitigationContingenciesLitigationContingenciesDetails Litigation Contingencies - Litigation Contingencies (Details) Details 130 false false R131.htm 2427402 - Disclosure - Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details) Sheet http://www.tcfbank.com/role/AccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossDetails Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details) Details http://www.tcfbank.com/role/AccumulatedOtherComprehensiveIncomeLossTables 131 false false R132.htm 2427403 - Disclosure - Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Details) Sheet http://www.tcfbank.com/role/AccumulatedOtherComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeLossDetails Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Details) Details http://www.tcfbank.com/role/AccumulatedOtherComprehensiveIncomeLossTables 132 false false R133.htm 2428401 - Disclosure - Pending Merger with Chemical Financial Corporation - Pending Merger with Chemical Financial Corporation (Details) Sheet http://www.tcfbank.com/role/PendingMergerWithChemicalFinancialCorporationPendingMergerWithChemicalFinancialCorporationDetails Pending Merger with Chemical Financial Corporation - Pending Merger with Chemical Financial Corporation (Details) Details 133 false false All Reports Book All Reports tcf-20181231.xml tcf-20181231.xsd tcf-20181231_cal.xml tcf-20181231_def.xml tcf-20181231_lab.xml tcf-20181231_pre.xml http://fasb.org/us-gaap/2018-01-31 http://xbrl.sec.gov/dei/2018-01-31 http://xbrl.sec.gov/invest/2013-01-31 http://fasb.org/srt/2018-01-31 true true