XML 138 R66.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Summary of Financial Effects of Troubled Debt Restructurings (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) Investment | Dec. 31, 2018 USD ($) Investment | Dec. 31, 2017 USD ($) Investment
Financing Receivable, Modifications [Line Items] |  |  |
Number of loans classified as a non-accrual TDRs | Investment | 73 | 22 | 71
Pre-Modification Recorded Investment | $ 35,287 | $ 8,663 | $ 61,641
Post-Modification Recorded Investment | 30,816 | 6,355 | 36,047
Trouble debt restructuring, charge-off amount | 4,471 | $ 2,308 | 14,273
Capitalized interest | $ 3 |  | $ 12
One-to-four family |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of loans classified as a non-accrual TDRs | Investment | 1 |  | 4
Pre-Modification Recorded Investment | $ 131 |  | $ 810
Post-Modification Recorded Investment | $ 131 |  | $ 986
Weighted Average Interest Rate, Pre-Modification | 5.50% |  | 5.93%
Weighted Average Interest Rate, Post-Modification | 5.50% |  | 2.21%
Capitalized interest |  |  | $ 12
Commercial and Industrial |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of loans classified as a non-accrual TDRs | Investment | 72 | 21 | 65
Pre-Modification Recorded Investment | $ 35,156 | $ 7,763 | $ 52,179
Post-Modification Recorded Investment | $ 30,685 | $ 5,455 | $ 26,409
Weighted Average Interest Rate, Pre-Modification | 4.31% | 3.25% | 3.36%
Weighted Average Interest Rate, Post-Modification | 4.37% | 3.13% | 3.29%
Trouble debt restructuring, charge-off amount | $ 4,471 | $ 2,308 | $ 14,273
Capitalized interest | $ 0 |  |
Acquisition, development, and construction |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of loans classified as a non-accrual TDRs | Investment |  | 1 | 2
Pre-Modification Recorded Investment |  | $ 900 | $ 8,652
Post-Modification Recorded Investment |  | $ 900 | $ 8,652
Weighted Average Interest Rate, Pre-Modification |  | 4.50% | 5.50%
Weighted Average Interest Rate, Post-Modification |  | 4.50% | 5.50%

X
- Definition Weighted Average Interest Rate Post Modification + References No definition available. + Details
Name: | nycb_WeightedAverageInterestRatePostModification
Namespace Prefix: | nycb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted Average Interest Rate Pre Modification + References No definition available. + Details
Name: | nycb_WeightedAverageInterestRatePreModification
Namespace Prefix: | nycb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before troubled debt restructuring, of financing receivable to be modified. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The gross interest income that would have been recorded in the period on troubled debt restructurings, if the loans had been current in accordance with their original terms and had been outstanding throughout the period or since origination, if held for part of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18794-111554 + Details
Name: | us-gaap_LoansAndLeasesReceivableImpairedTroubledDebtInterestIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

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