XML 88 R73.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Activity in Allowance for Losses on Non-Covered Loans (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Valuation Allowance [Line Items] |  |  |  |
Balance, beginning of period |  | $ 147,124 | $ 139,857 |
Charge-offs |  | (3,583) | (2,588) |
Recoveries |  | 2,875 | 10,773 |
Transfer from the allowance for losses on covered loans | [1] |  | 2,416 |
(Recovery of) provision for non-covered loan losses |  | 4,180 | (15,004) | $ (18,587)
Balance, end of period |  | 158,290 | 147,124 | 139,857
Non-Covered Loans |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
(Recovery of) provision for non-covered loan losses |  | 11,874 | (3,334) |
Mortgage Receivable |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Balance, beginning of period |  | 124,478 | 122,616 |
Charge-offs |  | (170) | (1,315) |
Recoveries |  | 1,272 | 5,765 |
Transfer from the allowance for losses on covered loans | [1] |  | 2,250 |
Balance, end of period |  | 125,416 | 124,478 | 122,616
Mortgage Receivable | Non-Covered Loans |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
(Recovery of) provision for non-covered loan losses |  | (164) | (4,838) |
Other loans |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
Balance, beginning of period |  | 22,646 | 17,241 |
Charge-offs |  | (3,413) | (1,273) |
Recoveries |  | 1,603 | 5,008 |
Transfer from the allowance for losses on covered loans | [1] |  | 166 |
Balance, end of period |  | 32,874 | 22,646 | $ 17,241
Other loans | Non-Covered Loans |  |  |  |
Valuation Allowance [Line Items] |  |  |  |
(Recovery of) provision for non-covered loan losses |  | $ 12,038 | $ 1,504 |
[1] | Represents the allowance associated with $14.2 million of loans acquired in the Desert Hills transaction that were transferred from covered loans to non-covered loans upon expiration of the related FDIC loss sharing agreement in March 2015.

X
- Definition Allowance For Loan Losses, Transfers From Allowance For Covered Loans + References No definition available. + Details
Name: | nyb_AllowanceForLoanLossesTransfersFromAllowanceForCoveredLoans
Namespace Prefix: | nyb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Provision Recoveries For Loan Losses + References No definition available. + Details
Name: | nyb_ProvisionRecoveriesForLoanLosses
Namespace Prefix: | nyb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_ValuationAllowanceLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_MortgageReceivablesMember
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: |