XML 48 R38.htm IDEA: XBRL DOCUMENT v3.19.2

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

Jun. 30, 2019

Dec. 31, 2018

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

Amortized Cost

$ 5,708,376

$ 5,660,418

Gross Unrealized Gain

80,312

46,339

Gross Unrealized Loss

17,957

62,686

Fair Value

5,770,731

5,644,071

Mortgage-related Securities

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

Amortized Cost

2,723,050

2,953,957

Gross Unrealized Gain

53,578

26,526

Gross Unrealized Loss

1,474

20,201

Fair Value

2,775,154

2,960,282

Mortgage-related Securities | GSE certificates

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

Amortized Cost

1,284,885

1,705,336

Gross Unrealized Gain

31,356

18,146

Gross Unrealized Loss

405

15,961

Fair Value

1,315,836

1,707,521

Mortgage-related Securities | GSE CMOs

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

Amortized Cost

1,438,165

1,248,621

Gross Unrealized Gain

22,222

8,380

Gross Unrealized Loss

1,069

4,240

Fair Value

1,459,318

1,252,761

Equity Securities [Member]

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

Amortized Cost

32,163

32,162

Gross Unrealized Gain

628

366

Gross Unrealized Loss

206

1,977

Fair Value

32,585

30,551

Equity Securities [Member] | Preferred stock

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

Amortized Cost

15,292

15,292

Gross Unrealized Gain

61

Gross Unrealized Loss

1,446

Fair Value

15,353

13,846

Equity Securities [Member] | Mutual Funds and Common Stock

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

Amortized Cost

^[1]

16,871

16,870

Gross Unrealized Gain

^[1]

567

366

Gross Unrealized Loss

^[1]

206

531

Fair Value

^[1]

17,232

16,705

Debt Securities [Member]

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

Amortized Cost

2,953,163

2,674,299

Gross Unrealized Gain

26,106

19,447

Gross Unrealized Loss

16,277

40,508

Fair Value

2,962,992

2,653,238

Debt Securities [Member] | U.S. Treasury obligations

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

Amortized Cost

29,840

Gross Unrealized Gain

23

Gross Unrealized Loss

Fair Value

29,863

Debt Securities [Member] | GSE debentures

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

Amortized Cost

1,602,270

1,334,549

Gross Unrealized Gain

7,160

3,366

Gross Unrealized Loss

1,067

8,988

Fair Value

1,608,363

1,328,927

Debt Securities [Member] | Corporate bonds

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

Amortized Cost

859,812

836,153

Gross Unrealized Gain

11,737

8,667

Gross Unrealized Loss

6,592

23,105

Fair Value

864,957

821,715

Debt Securities [Member] | Municipal bonds

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

Amortized Cost

27,383

68,551

Gross Unrealized Gain

578

195

Gross Unrealized Loss

485

2,563

Fair Value

27,476

66,183

Debt Securities [Member] | Capital trust notes

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

Amortized Cost

48,304

48,278

Gross Unrealized Gain

6,608

6,435

Gross Unrealized Loss

5,161

5,422

Fair Value

49,751

49,291

Debt Securities [Member] | Asset-backed Securities [Member]

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

Amortized Cost

^[2]

385,554

386,768

Gross Unrealized Gain

^[2]

784

Gross Unrealized Loss

^[2]

2,972

430

Fair Value

^[2]

382,582

387,122

Mortgage Backed Securities And Other Securities [Member]

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

Amortized Cost

5,676,213

^[3]

5,628,256

^[4]

Gross Unrealized Gain

79,684

^[3]

45,973

^[4]

Gross Unrealized Loss

17,751

^[3]

60,709

^[4]

Fair Value

$ 5,738,146

^[3]

$ 5,613,520

^[4]

[1]	Primarily consists of mutual funds that are CRA-qualified investments.
[2]	The underlying assets of the asset-backed securities are substantially guaranteed by the U.S. Government.
[3]	The amortized cost includes the non-credit portion of OTTI recorded in AOCL. At June 30, 2019, the non-credit portion of OTTI recorded in AOCL was $8.6 million before taxes.
[4]	The amortized cost includes the non-credit portion of OTTI recorded in AOCL. At December 31, 2018, the non-credit portion of OTTI recorded in AOCL was $8.6 million before taxes.

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=82897076&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_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_InvestmentTypeAxis=nycb_MutualFundsAndCommonStockMember
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_InvestmentTypeAxis=us-gaap_AssetBackedSecuritiesMember
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: