3.22.2 html 866 449 1 true 146 0 false 18 false false R1.htm 0001001 - Document - Cover Page Sheet http://www.flagstar.com/role/CoverPage Cover Page Cover 1 false false R2.htm 1001002 - Statement - Consolidated Statements of Financial Condition Sheet http://www.flagstar.com/role/ConsolidatedStatementsofFinancialCondition Consolidated Statements of Financial Condition Statements 2 false false R3.htm 1002003 - Statement - Consolidated Statements of Financial Condition (Parenthetical) Sheet http://www.flagstar.com/role/ConsolidatedStatementsofFinancialConditionParenthetical Consolidated Statements of Financial Condition (Parenthetical) Statements 3 false false R4.htm 1003004 - Statement - Consolidated Statements of Operations Sheet http://www.flagstar.com/role/ConsolidatedStatementsofOperations Consolidated Statements of Operations Statements 4 false false R5.htm 1004005 - Statement - Consolidated Statements of Comprehensive Income Sheet http://www.flagstar.com/role/ConsolidatedStatementsofComprehensiveIncome Consolidated Statements of Comprehensive Income Statements 5 false false R6.htm 1005006 - Statement - Consolidated Statements of Stockholders' Equity Sheet http://www.flagstar.com/role/ConsolidatedStatementsofStockholdersEquity Consolidated Statements of Stockholders' Equity Statements 6 false false R7.htm 1006007 - Statement - Consolidated Statements of Cash Flows Sheet http://www.flagstar.com/role/ConsolidatedStatementsofCashFlows Consolidated Statements of Cash Flows Statements 7 false false R8.htm 2101101 - Disclosure - Basis of Presentation Sheet http://www.flagstar.com/role/BasisofPresentation Basis of Presentation Notes 8 false false R9.htm 2103102 - Disclosure - Investment Securities Sheet http://www.flagstar.com/role/InvestmentSecurities Investment Securities Notes 9 false false R10.htm 2111103 - Disclosure - Loans Held-for-Sale Sheet http://www.flagstar.com/role/LoansHeldforSale Loans Held-for-Sale Notes 10 false false R11.htm 2113104 - Disclosure - Loans Held-for-Investment Sheet http://www.flagstar.com/role/LoansHeldforInvestment Loans Held-for-Investment Notes 11 false false R12.htm 2121105 - Disclosure - Loans with Government Guarantees Sheet http://www.flagstar.com/role/LoanswithGovernmentGuarantees Loans with Government Guarantees Notes 12 false false R13.htm 2123106 - Disclosure - Variable Interest Entities Sheet http://www.flagstar.com/role/VariableInterestEntities Variable Interest Entities Notes 13 false false R14.htm 2125107 - Disclosure - Mortgage Servicing Rights Sheet http://www.flagstar.com/role/MortgageServicingRights Mortgage Servicing Rights Notes 14 false false R15.htm 2130108 - Disclosure - Derivative Financial Instruments Sheet http://www.flagstar.com/role/DerivativeFinancialInstruments Derivative Financial Instruments Notes 15 false false R16.htm 2136109 - Disclosure - Borrowings Sheet http://www.flagstar.com/role/Borrowings Borrowings Notes 16 false false R17.htm 2143110 - Disclosure - Accumulated Other Comprehensive Income (Loss) Sheet http://www.flagstar.com/role/AccumulatedOtherComprehensiveIncomeLoss Accumulated Other Comprehensive Income (Loss) Notes 17 false false R18.htm 2146111 - Disclosure - Earnings Per Share Sheet http://www.flagstar.com/role/EarningsPerShare Earnings Per Share Notes 18 false false R19.htm 2149112 - Disclosure - Stock-Based Compensation Sheet http://www.flagstar.com/role/StockBasedCompensation Stock-Based Compensation Notes 19 false false R20.htm 2153113 - Disclosure - Income Taxes Sheet http://www.flagstar.com/role/IncomeTaxes Income Taxes Notes 20 false false R21.htm 2156114 - Disclosure - Regulatory Matters Sheet http://www.flagstar.com/role/RegulatoryMatters Regulatory Matters Notes 21 false false R22.htm 2159115 - Disclosure - Legal Proceedings, Contingencies and Commitments Sheet http://www.flagstar.com/role/LegalProceedingsContingenciesandCommitments Legal Proceedings, Contingencies and Commitments Notes 22 false false R23.htm 2163116 - Disclosure - Fair Value Measurements Sheet http://www.flagstar.com/role/FairValueMeasurements Fair Value Measurements Notes 23 false false R24.htm 2174117 - Disclosure - Segment Information Sheet http://www.flagstar.com/role/SegmentInformation Segment Information Notes 24 false false R25.htm 2177118 - Disclosure - Recently Issued Accounting Pronouncements Sheet http://www.flagstar.com/role/RecentlyIssuedAccountingPronouncements Recently Issued Accounting Pronouncements Notes 25 false false R26.htm 2279201 - Disclosure - Recently Issued Accounting Pronouncements (Policies) Sheet http://www.flagstar.com/role/RecentlyIssuedAccountingPronouncementsPolicies Recently Issued Accounting Pronouncements (Policies) Policies http://www.flagstar.com/role/RecentlyIssuedAccountingPronouncements 26 false false R27.htm 2304301 - Disclosure - Investment Securities (Tables) Sheet http://www.flagstar.com/role/InvestmentSecuritiesTables Investment Securities (Tables) Tables http://www.flagstar.com/role/InvestmentSecurities 27 false false R28.htm 2314302 - Disclosure - Loans Held-for-Investment (Tables) Sheet http://www.flagstar.com/role/LoansHeldforInvestmentTables Loans Held-for-Investment (Tables) Tables http://www.flagstar.com/role/LoansHeldforInvestment 28 false false R29.htm 2326303 - Disclosure - Mortgage Servicing Rights (Tables) Sheet http://www.flagstar.com/role/MortgageServicingRightsTables Mortgage Servicing Rights (Tables) Tables http://www.flagstar.com/role/MortgageServicingRights 29 false false R30.htm 2331304 - Disclosure - Derivative Financial Instruments (Tables) Sheet http://www.flagstar.com/role/DerivativeFinancialInstrumentsTables Derivative Financial Instruments (Tables) Tables http://www.flagstar.com/role/DerivativeFinancialInstruments 30 false false R31.htm 2337305 - Disclosure - Borrowings (Tables) Sheet http://www.flagstar.com/role/BorrowingsTables Borrowings (Tables) Tables http://www.flagstar.com/role/Borrowings 31 false false R32.htm 2344306 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables) Sheet http://www.flagstar.com/role/AccumulatedOtherComprehensiveIncomeLossTables Accumulated Other Comprehensive Income (Loss) (Tables) Tables http://www.flagstar.com/role/AccumulatedOtherComprehensiveIncomeLoss 32 false false R33.htm 2347307 - Disclosure - Earnings Per Share (Tables) Sheet http://www.flagstar.com/role/EarningsPerShareTables Earnings Per Share (Tables) Tables http://www.flagstar.com/role/EarningsPerShare 33 false false R34.htm 2350308 - Disclosure - Stock-Based Compensation (Tables) Sheet http://www.flagstar.com/role/StockBasedCompensationTables Stock-Based Compensation (Tables) Tables http://www.flagstar.com/role/StockBasedCompensation 34 false false R35.htm 2354309 - Disclosure - Income Taxes (Tables) Sheet http://www.flagstar.com/role/IncomeTaxesTables Income Taxes (Tables) Tables http://www.flagstar.com/role/IncomeTaxes 35 false false R36.htm 2357310 - Disclosure - Regulatory Matters (Tables) Sheet http://www.flagstar.com/role/RegulatoryMattersTables Regulatory Matters (Tables) Tables http://www.flagstar.com/role/RegulatoryMatters 36 false false R37.htm 2360311 - Disclosure - Legal Proceedings, Contingencies and Commitments (Tables) Sheet http://www.flagstar.com/role/LegalProceedingsContingenciesandCommitmentsTables Legal Proceedings, Contingencies and Commitments (Tables) Tables http://www.flagstar.com/role/LegalProceedingsContingenciesandCommitments 37 false false R38.htm 2364312 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.flagstar.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.flagstar.com/role/FairValueMeasurements 38 false false R39.htm 2375313 - Disclosure - Segment Information (Tables) Sheet http://www.flagstar.com/role/SegmentInformationTables Segment Information (Tables) Tables http://www.flagstar.com/role/SegmentInformation 39 false false R40.htm 2378314 - Disclosure - Recently Issued Accounting Pronouncements (Tables) Sheet http://www.flagstar.com/role/RecentlyIssuedAccountingPronouncementsTables Recently Issued Accounting Pronouncements (Tables) Tables http://www.flagstar.com/role/RecentlyIssuedAccountingPronouncements 40 false false R41.htm 2402401 - Disclosure - Basis of Presentation (Details) Sheet http://www.flagstar.com/role/BasisofPresentationDetails Basis of Presentation (Details) Details http://www.flagstar.com/role/BasisofPresentation 41 false false R42.htm 2405402 - Disclosure - Investment Securities - Summary of Investment Securities (Details) Sheet http://www.flagstar.com/role/InvestmentSecuritiesSummaryofInvestmentSecuritiesDetails Investment Securities - Summary of Investment Securities (Details) Details 42 false false R43.htm 2406403 - Disclosure - Investment Securities - Narrative (Details) Sheet http://www.flagstar.com/role/InvestmentSecuritiesNarrativeDetails Investment Securities - Narrative (Details) Details 43 false false R44.htm 2407404 - Disclosure - Investment Securities - Available-for-Sale Securities (Details) Sheet http://www.flagstar.com/role/InvestmentSecuritiesAvailableforSaleSecuritiesDetails Investment Securities - Available-for-Sale Securities (Details) Details 44 false false R45.htm 2408405 - Disclosure - Investment Securities - Held-to-Maturity Securities (Details) Sheet http://www.flagstar.com/role/InvestmentSecuritiesHeldtoMaturitySecuritiesDetails Investment Securities - Held-to-Maturity Securities (Details) Details 45 false false R46.htm 2409406 - Disclosure - Investment Securities - Summary of Unrealized Loss Positions on Investment Securities (Details) Sheet http://www.flagstar.com/role/InvestmentSecuritiesSummaryofUnrealizedLossPositionsonInvestmentSecuritiesDetails Investment Securities - Summary of Unrealized Loss Positions on Investment Securities (Details) Details 46 false false R47.htm 2410407 - Disclosure - Investment Securities - Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity (Details) Sheet http://www.flagstar.com/role/InvestmentSecuritiesAmortizedCostandEstimatedFairValueofSecuritiesbyContractualMaturityDetails Investment Securities - Amortized Cost and Estimated Fair Value of Securities by Contractual Maturity (Details) Details 47 false false R48.htm 2412408 - Disclosure - Loans Held-for-Sale (Details) Sheet http://www.flagstar.com/role/LoansHeldforSaleDetails Loans Held-for-Sale (Details) Details http://www.flagstar.com/role/LoansHeldforSale 48 false false R49.htm 2415409 - Disclosure - Loans Held-for-Investment - Narrative (Details) Sheet http://www.flagstar.com/role/LoansHeldforInvestmentNarrativeDetails Loans Held-for-Investment - Narrative (Details) Details 49 false false R50.htm 2416410 - Disclosure - Loans Held-for-Investment - Summary of Loans Held-for-Investment and UPB of Loan Sales and Purchases in the Loans Held-for-Investment Portfolio (Details) Sheet http://www.flagstar.com/role/LoansHeldforInvestmentSummaryofLoansHeldforInvestmentandUPBofLoanSalesandPurchasesintheLoansHeldforInvestmentPortfolioDetails Loans Held-for-Investment - Summary of Loans Held-for-Investment and UPB of Loan Sales and Purchases in the Loans Held-for-Investment Portfolio (Details) Details 50 false false R51.htm 2417411 - Disclosure - Loans Held-for-Investment - Changes in ALLL by Class of Loan (Details) Sheet http://www.flagstar.com/role/LoansHeldforInvestmentChangesinALLLbyClassofLoanDetails Loans Held-for-Investment - Changes in ALLL by Class of Loan (Details) Details 51 false false R52.htm 2418412 - Disclosure - Loans Held-for-Investment - Aging Analysis of Past Due and Current Loans (Details) Sheet http://www.flagstar.com/role/LoansHeldforInvestmentAgingAnalysisofPastDueandCurrentLoansDetails Loans Held-for-Investment - Aging Analysis of Past Due and Current Loans (Details) Details 52 false false R53.htm 2419413 - Disclosure - Loans Held-for-Investment - Summary of TDRs by Type and Performing Status and Newly Modified TDRs (Details) Sheet http://www.flagstar.com/role/LoansHeldforInvestmentSummaryofTDRsbyTypeandPerformingStatusandNewlyModifiedTDRsDetails Loans Held-for-Investment - Summary of TDRs by Type and Performing Status and Newly Modified TDRs (Details) Details 53 false false R54.htm 2420414 - Disclosure - Loans Held-for-Investment - Loan Quality Indicators (Details) Sheet http://www.flagstar.com/role/LoansHeldforInvestmentLoanQualityIndicatorsDetails Loans Held-for-Investment - Loan Quality Indicators (Details) Details 54 false false R55.htm 2422415 - Disclosure - Loans with Government Guarantees (Details) Sheet http://www.flagstar.com/role/LoanswithGovernmentGuaranteesDetails Loans with Government Guarantees (Details) Details http://www.flagstar.com/role/LoanswithGovernmentGuarantees 55 false false R56.htm 2424416 - Disclosure - Variable Interest Entities (Details) Sheet http://www.flagstar.com/role/VariableInterestEntitiesDetails Variable Interest Entities (Details) Details http://www.flagstar.com/role/VariableInterestEntities 56 false false R57.htm 2427417 - Disclosure - Mortgage Servicing Rights - Changes in the Fair Value of Residential First Mortgage MSRs (Details) Sheet http://www.flagstar.com/role/MortgageServicingRightsChangesintheFairValueofResidentialFirstMortgageMSRsDetails Mortgage Servicing Rights - Changes in the Fair Value of Residential First Mortgage MSRs (Details) Details 57 false false R58.htm 2428418 - Disclosure - Mortgage Servicing Rights - Summary of Adverse Changes to Weighted-Average Assumptions on the Fair Value of Servicing Rights (Details) Sheet http://www.flagstar.com/role/MortgageServicingRightsSummaryofAdverseChangestoWeightedAverageAssumptionsontheFairValueofServicingRightsDetails Mortgage Servicing Rights - Summary of Adverse Changes to Weighted-Average Assumptions on the Fair Value of Servicing Rights (Details) Details 58 false false R59.htm 2429419 - Disclosure - Mortgage Servicing Rights - Summary of Income and Fees (Details) Sheet http://www.flagstar.com/role/MortgageServicingRightsSummaryofIncomeandFeesDetails Mortgage Servicing Rights - Summary of Income and Fees (Details) Details 59 false false R60.htm 2432420 - Disclosure - Derivative Financial Instruments - Narrative (Details) Sheet http://www.flagstar.com/role/DerivativeFinancialInstrumentsNarrativeDetails Derivative Financial Instruments - Narrative (Details) Details 60 false false R61.htm 2433421 - Disclosure - Derivative Financial Instruments - Notional Amount, Estimated Fair Value and Maturity of Derivative Financial Instruments (Details) Sheet http://www.flagstar.com/role/DerivativeFinancialInstrumentsNotionalAmountEstimatedFairValueandMaturityofDerivativeFinancialInstrumentsDetails Derivative Financial Instruments - Notional Amount, Estimated Fair Value and Maturity of Derivative Financial Instruments (Details) Details 61 false false R62.htm 2434422 - Disclosure - Derivative Financial Instruments - Derivatives Subject to a Master Netting Arrangement (Details) Sheet http://www.flagstar.com/role/DerivativeFinancialInstrumentsDerivativesSubjecttoaMasterNettingArrangementDetails Derivative Financial Instruments - Derivatives Subject to a Master Netting Arrangement (Details) Details 62 false false R63.htm 2435423 - Disclosure - Derivative Financial Instruments - Net Gain (Loss) Recognized in Income on Derivative Instruments (Details) Sheet http://www.flagstar.com/role/DerivativeFinancialInstrumentsNetGainLossRecognizedinIncomeonDerivativeInstrumentsDetails Derivative Financial Instruments - Net Gain (Loss) Recognized in Income on Derivative Instruments (Details) Details 63 false false R64.htm 2438424 - Disclosure - Borrowings - Breakdown of FHLB Advances Outstanding (Details) Sheet http://www.flagstar.com/role/BorrowingsBreakdownofFHLBAdvancesOutstandingDetails Borrowings - Breakdown of FHLB Advances Outstanding (Details) Details 64 false false R65.htm 2439425 - Disclosure - Borrowings - Detailed Information on FHLB Advances and Other Borrowings (Details) Sheet http://www.flagstar.com/role/BorrowingsDetailedInformationonFHLBAdvancesandOtherBorrowingsDetails Borrowings - Detailed Information on FHLB Advances and Other Borrowings (Details) Details 65 false false R66.htm 2440426 - Disclosure - Borrowings - Maturity Dates of FHLB Advances and Other Borrowings (Details) Sheet http://www.flagstar.com/role/BorrowingsMaturityDatesofFHLBAdvancesandOtherBorrowingsDetails Borrowings - Maturity Dates of FHLB Advances and Other Borrowings (Details) Details 66 false false R67.htm 2441427 - Disclosure - Borrowings - Summary of Long-Term Debt, Net of Debt Issuance Costs (Details) Sheet http://www.flagstar.com/role/BorrowingsSummaryofLongTermDebtNetofDebtIssuanceCostsDetails Borrowings - Summary of Long-Term Debt, Net of Debt Issuance Costs (Details) Details 67 false false R68.htm 2442428 - Disclosure - Borrowings - Narrative (Details) Sheet http://www.flagstar.com/role/BorrowingsNarrativeDetails Borrowings - Narrative (Details) Details 68 false false R69.htm 2445429 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Details) Sheet http://www.flagstar.com/role/AccumulatedOtherComprehensiveIncomeLossDetails Accumulated Other Comprehensive Income (Loss) (Details) Details http://www.flagstar.com/role/AccumulatedOtherComprehensiveIncomeLossTables 69 false false R70.htm 2448430 - Disclosure - Earnings Per Share (Details) Sheet http://www.flagstar.com/role/EarningsPerShareDetails Earnings Per Share (Details) Details http://www.flagstar.com/role/EarningsPerShareTables 70 false false R71.htm 2451431 - Disclosure - Stock-Based Compensation - Narrative (Details) Sheet http://www.flagstar.com/role/StockBasedCompensationNarrativeDetails Stock-Based Compensation - Narrative (Details) Details 71 false false R72.htm 2452432 - Disclosure - Stock-Based Compensation - Summary of Restricted Stock Activity (Details) Sheet http://www.flagstar.com/role/StockBasedCompensationSummaryofRestrictedStockActivityDetails Stock-Based Compensation - Summary of Restricted Stock Activity (Details) Details 72 false false R73.htm 2455433 - Disclosure - Income Taxes (Details) Sheet http://www.flagstar.com/role/IncomeTaxesDetails Income Taxes (Details) Details http://www.flagstar.com/role/IncomeTaxesTables 73 false false R74.htm 2458434 - Disclosure - Regulatory Matters (Details) Sheet http://www.flagstar.com/role/RegulatoryMattersDetails Regulatory Matters (Details) Details http://www.flagstar.com/role/RegulatoryMattersTables 74 false false R75.htm 2461435 - Disclosure - Legal Proceedings, Contingencies and Commitments - Narrative (Details) Sheet http://www.flagstar.com/role/LegalProceedingsContingenciesandCommitmentsNarrativeDetails Legal Proceedings, Contingencies and Commitments - Narrative (Details) Details http://www.flagstar.com/role/LegalProceedingsContingenciesandCommitmentsTables 75 false false R76.htm 2462436 - Disclosure - Legal Proceedings, Contingencies and Commitments - Summary of the Contractual Amount of Significant Commitments (Details) Sheet http://www.flagstar.com/role/LegalProceedingsContingenciesandCommitmentsSummaryoftheContractualAmountofSignificantCommitmentsDetails Legal Proceedings, Contingencies and Commitments - Summary of the Contractual Amount of Significant Commitments (Details) Details 76 false false R77.htm 2465437 - Disclosure - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Sheet http://www.flagstar.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) Details 77 false false R78.htm 2466438 - Disclosure - Fair Value Measurements - Roll Forward of Financial Instruments Classified as Level 3 (Details) Sheet http://www.flagstar.com/role/FairValueMeasurementsRollForwardofFinancialInstrumentsClassifiedasLevel3Details Fair Value Measurements - Roll Forward of Financial Instruments Classified as Level 3 (Details) Details 78 false false R79.htm 2467439 - Disclosure - Fair Value Measurements - Quantitative Information about Recurring Level 3 Fair Value Instruments (Details) Sheet http://www.flagstar.com/role/FairValueMeasurementsQuantitativeInformationaboutRecurringLevel3FairValueInstrumentsDetails Fair Value Measurements - Quantitative Information about Recurring Level 3 Fair Value Instruments (Details) Details 79 false false R80.htm 2468440 - Disclosure - Fair Value Measurements - Narrative (Details) Sheet http://www.flagstar.com/role/FairValueMeasurementsNarrativeDetails Fair Value Measurements - Narrative (Details) Details 80 false false R81.htm 2469441 - Disclosure - Fair Value Measurements - Assets Measured at Fair Value on Nonrecurring Basis (Details) Sheet http://www.flagstar.com/role/FairValueMeasurementsAssetsMeasuredatFairValueonNonrecurringBasisDetails Fair Value Measurements - Assets Measured at Fair Value on Nonrecurring Basis (Details) Details 81 false false R82.htm 2470442 - Disclosure - Fair Value Measurements - Quantitative Information about Nonrecurring Level 3 Fair Value Financial Instruments and the Fair Value Measurements (Details) Sheet http://www.flagstar.com/role/FairValueMeasurementsQuantitativeInformationaboutNonrecurringLevel3FairValueFinancialInstrumentsandtheFairValueMeasurementsDetails Fair Value Measurements - Quantitative Information about Nonrecurring Level 3 Fair Value Financial Instruments and the Fair Value Measurements (Details) Details 82 false false R83.htm 2471443 - Disclosure - Fair Value Measurements - Carrying Amount and Estimated Fair Value (Details) Sheet http://www.flagstar.com/role/FairValueMeasurementsCarryingAmountandEstimatedFairValueDetails Fair Value Measurements - Carrying Amount and Estimated Fair Value (Details) Details 83 false false R84.htm 2472444 - Disclosure - Fair Value Measurements - Fair Value Option (Details) Sheet http://www.flagstar.com/role/FairValueMeasurementsFairValueOptionDetails Fair Value Measurements - Fair Value Option (Details) Details 84 false false R85.htm 2473445 - Disclosure - Fair Value Measurements - Differences Between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding (Details) Sheet http://www.flagstar.com/role/FairValueMeasurementsDifferencesBetweenAggregateFairValueandAggregateRemainingContractualPrincipalBalanceOutstandingDetails Fair Value Measurements - Differences Between Aggregate Fair Value and Aggregate Remaining Contractual Principal Balance Outstanding (Details) Details 85 false false R86.htm 2476446 - Disclosure - Segment Information (Details) Sheet http://www.flagstar.com/role/SegmentInformationDetails Segment Information (Details) Details http://www.flagstar.com/role/SegmentInformationTables 86 false false All Reports Book All Reports fbc-20220630.htm exhibit311section302certif.htm exhibit312section302certif.htm exhibit321section906certif.htm exhibit322section906certif.htm fbc-20220630.xsd fbc-20220630_cal.xml fbc-20220630_def.xml fbc-20220630_lab.xml fbc-20220630_pre.xml fbc-20220630_g1.jpg http://fasb.org/us-gaap/2022 http://xbrl.sec.gov/dei/2022 true true