XML 53 R40.htm IDEA: XBRL DOCUMENT v2.4.1.9
Summary of Portfolio of Securities Available for Sale (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 167,821us-gaap_AvailableForSaleSecuritiesAmortizedCost $ 168,770us-gaap_AvailableForSaleSecuritiesAmortizedCost
Gross Unrealized Gain 10,431us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax 7,476us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Gross Unrealized Loss 2,542us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax 2,463us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Fair Value 175,710us-gaap_AvailableForSaleSecurities 173,783us-gaap_AvailableForSaleSecurities
Mortgage-Related Securities    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 17,400us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember		 18,350us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember
Gross Unrealized Gain 1,371us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember		 1,350us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember
Fair Value 18,771us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember		 19,700us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember
Mortgage-Related Securities | GSE certificates    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 17,400us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember		 [1] 18,350us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Gross Unrealized Gain 1,371us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember		 [1] 1,350us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Fair Value 18,771us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember		 [1] 19,700us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= us-gaap_MortgageBackedSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Other Securities    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 150,421us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember		 150,420us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
Gross Unrealized Gain 9,060us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember		 6,126us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
Gross Unrealized Loss 2,542us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember		 2,463us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
Fair Value 156,939us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember		 154,083us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
Other Securities | Municipal bonds    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 843us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MunicipalBondsMember		 841us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MunicipalBondsMember
Gross Unrealized Gain 97us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MunicipalBondsMember		 101us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MunicipalBondsMember
Fair Value 940us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MunicipalBondsMember		 942us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_MunicipalBondsMember
Other Securities | Capital trust notes    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 13,434us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateNoteSecuritiesMember		 13,431us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateNoteSecuritiesMember
Gross Unrealized Gain 41us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateNoteSecuritiesMember		 31us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateNoteSecuritiesMember
Gross Unrealized Loss 2,471us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateNoteSecuritiesMember		 1,980us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateNoteSecuritiesMember
Fair Value 11,004us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateNoteSecuritiesMember		 11,482us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CorporateNoteSecuritiesMember
Other Securities | Preferred stock    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 118,205us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember		 118,205us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
Gross Unrealized Gain 8,098us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember		 5,246us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
Gross Unrealized Loss   440us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
Fair Value 126,303us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember		 123,011us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_PreferredStockMember
Other Securities | Mutual Funds and Common Stock    
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost 17,939us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nyb_MutualFundsAndCommonStockMember		 [2] 17,943us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nyb_MutualFundsAndCommonStockMember
Gross Unrealized Gain 824us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nyb_MutualFundsAndCommonStockMember		 [2] 748us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nyb_MutualFundsAndCommonStockMember
Gross Unrealized Loss 71us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nyb_MutualFundsAndCommonStockMember		 [2] 43us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nyb_MutualFundsAndCommonStockMember
Fair Value $ 18,692us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nyb_MutualFundsAndCommonStockMember		 [2] $ 18,648us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentSecondaryCategorizationAxis
= nyb_OtherSecuritiesMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= nyb_MutualFundsAndCommonStockMember
[1] Government-sponsored enterprise
[2] Primarily consists of mutual funds that are Community Reinvestment Act-qualified investments