XML 70 R60.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Covered Loans Thirty to Eighty Nine Days, Ninety Days or More Past Due (Detail) - Covered Loans - Covered loans held for sale - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Loans 90 Days Or More Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | $ 129,093 | $ 131,465
Loans 90 Days Or More Past Due | One-to-four family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 120,815 | 124,820
Loans 90 Days Or More Past Due | Other loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 8,278 | 6,645
Financing Receivable, 30-89 Days Past Due |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 22,852 | 22,648
Financing Receivable, 30-89 Days Past Due | One-to-four family |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | 17,718 | 21,112
Financing Receivable, 30-89 Days Past Due | Other loans |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total Past Due | $ 5,134 | $ 1,536

X
- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDue
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_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis=nyb_CoveredLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=nyb_OneToFourFamilyMortgageLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=nyb_OtherLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=nyb_FinancingReceivableThirtyToEightyNineDaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |