XML 19 R38.htm IDEA: XBRL DOCUMENT v3.20.1

Summary of Portfolio of Securities Available for Sale (Detail) - USD ($)
$ in Thousands

Mar. 31, 2020

Dec. 31, 2019

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

$ 5,461,502

^[1]

$ 5,841,796

^[2]

Gross Unrealized Gain

146,332

^[1]

77,498

^[2]

Gross Unrealized Loss

119,973

^[1]

33,407

^[2]

Fair Value

5,487,861

^[1]

5,885,887

^[2]

Mutual Funds and Common Stock

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

^[3]

16,871

16,871

Gross Unrealized Gain

^[3]

904

718

Gross Unrealized Loss

^[3]

173

Fair Value

^[3]

17,775

17,416

Asset-backed Securities

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

^[4]

383,289

384,108

Gross Unrealized Loss

^[4]

27,906

10,854

Fair Value

^[4]

355,383

373,254

Mortgage-related Securities

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

3,290,467

3,313,757

Gross Unrealized Gain

122,890

47,282

Gross Unrealized Loss

5,815

7,304

Fair Value

3,407,542

3,353,735

Mortgage-related Securities | GSE certificates

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

1,421,081

1,530,317

Gross Unrealized Gain

72,190

26,069

Gross Unrealized Loss

2

3,763

Fair Value

1,493,269

1,552,623

Mortgage-related Securities | GSE CMOs

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

1,869,386

1,783,440

Gross Unrealized Gain

50,700

21,213

Gross Unrealized Loss

5,813

3,541

Fair Value

1,914,273

1,801,112

Equity Securities

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

32,163

32,163

Gross Unrealized Gain

904

840

Gross Unrealized Loss

451

173

Fair Value

32,616

32,830

Equity Securities | Preferred stock

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

15,292

15,292

Gross Unrealized Gain

122

Gross Unrealized Loss

451

Fair Value

14,841

15,414

Debt Securities

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

2,138,872

2,495,876

Gross Unrealized Gain

22,538

29,376

Gross Unrealized Loss

113,707

25,930

Fair Value

2,047,703

2,499,322

Debt Securities | U.S. Treasury obligations

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

61,812

41,820

Gross Unrealized Gain

172

19

Gross Unrealized Loss

3

Fair Value

61,981

41,839

Debt Securities | GSE debentures

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

717,495

1,093,845

Gross Unrealized Gain

7,737

5,707

Gross Unrealized Loss

5,312

Fair Value

725,232

1,094,240

Debt Securities | Corporate bonds

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

854,336

854,195

Gross Unrealized Gain

8,874

15,970

Gross Unrealized Loss

70,376

2,983

Fair Value

792,834

867,182

Debt Securities | Municipal bonds

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

26,745

26,808

Gross Unrealized Gain

615

559

Gross Unrealized Loss

614

475

Fair Value

26,746

26,892

Debt Securities | Capital trust notes

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

95,195

95,100

Gross Unrealized Gain

5,140

7,121

Gross Unrealized Loss

14,808

6,306

Fair Value

85,527

95,915

Mortgage Backed Securities And Other Securities

Schedule of Available-for-sale Securities [Line Items]

Amortized Cost

5,429,339

5,809,633

Gross Unrealized Gain

145,428

76,658

Gross Unrealized Loss

119,522

33,234

Fair Value

$ 5,455,245

$ 5,853,057

[1]	Excludes accrued interest receivable of $20.6 million included in other assets in the Consolidated Statements of Condition.
[2]	Excludes accrued interest receivable of $24.4 million included in other assets in the Consolidated Statements of Condition.
[3]	Primarily consists of mutual funds that are CRA-qualified investments.
[4]	The underlying assets of the asset-backed securities are substantially guaranteed by the U.S. Government.

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_InvestmentTypeAxis=nycb_MutualFundsAndCommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_CollateralizedMortgageObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_PreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_DebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_MunicipalBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_CorporateNoteSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=nycb_MortgageBackedSecuritiesAndOtherSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: