XML 70 R55.htm IDEA: XBRL DOCUMENT
v3.20.4

Securities - Summary of Held-to-Maturity and Available-for-Sale Securities Having Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Schedule of Investments [Line Items] |  |
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Fair Value | $ 1,095,548 | $ 1,671,447
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Unrealized Loss | 9,868 | 18,617
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Fair Value | 725,998 | 627,545
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Unrealized Loss | 19,829 | 14,790
Temporarily Impaired Available-for-Sale Securities, Total Fair Value | 1,821,546 | 2,298,992
Temporarily Impaired Available-for-Sale Securities, Total Unrealized Loss | 29,697 | 33,407
Debt Securities | U. S. Treasury Obligations |  |
Schedule of Investments [Line Items] |  |
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Fair Value |  | 11,917
Temporarily Impaired Available-for-Sale Securities, Total Fair Value |  | 11,917
Debt Securities | GSE Certificates |  |
Schedule of Investments [Line Items] |  |
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Fair Value | 58,876 | 396,930
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Unrealized Loss | 136 | 3,718
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Fair Value |  | 7,542
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Unrealized Loss |  | 45
Temporarily Impaired Available-for-Sale Securities, Total Fair Value | 58,876 | 404,472
Temporarily Impaired Available-for-Sale Securities, Total Unrealized Loss | 136 | 3,763
Debt Securities | GSE CMOs |  |
Schedule of Investments [Line Items] |  |
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Fair Value | 442,207 | 609,502
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Unrealized Loss | 2,807 | 2,582
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Fair Value | 73,568 | 133,955
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Unrealized Loss | 65 | 959
Temporarily Impaired Available-for-Sale Securities, Total Fair Value | 515,775 | 743,457
Temporarily Impaired Available-for-Sale Securities, Total Unrealized Loss | 2,872 | 3,541
Debt Securities | GSE Debentures |  |
Schedule of Investments [Line Items] |  |
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Fair Value | 522,441 | 297,179
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Unrealized Loss | 3,949 | 3,916
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Fair Value |  | 138,189
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Unrealized Loss |  | 1,396
Temporarily Impaired Available-for-Sale Securities, Total Fair Value | 522,441 | 435,368
Temporarily Impaired Available-for-Sale Securities, Total Unrealized Loss | 3,949 | 5,312
Debt Securities | Asset-backed Securities |  |
Schedule of Investments [Line Items] |  |
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Fair Value |  | 256,619
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Unrealized Loss |  | 7,701
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Fair Value | 363,618 | 116,635
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Unrealized Loss | 5,703 | 3,154
Temporarily Impaired Available-for-Sale Securities, Total Fair Value | 363,618 | 373,254
Temporarily Impaired Available-for-Sale Securities, Total Unrealized Loss | 5,703 | 10,855
Debt Securities | Municipal Bonds |  |
Schedule of Investments [Line Items] |  |
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Fair Value | 8,891 | 9,349
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Unrealized Loss | 90 | 475
Temporarily Impaired Available-for-Sale Securities, Total Fair Value | 8,891 | 9,349
Temporarily Impaired Available-for-Sale Securities, Total Unrealized Loss | 90 | 475
Debt Securities | Corporate Bonds |  |
Schedule of Investments [Line Items] |  |
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Fair Value | 72,024 | 99,300
Temporarily Impaired Available-for-Sale Securities, Less than Twelve Months Unrealized Loss | 2,976 | 700
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Fair Value | 246,528 | 172,717
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Unrealized Loss | 3,471 | 2,282
Temporarily Impaired Available-for-Sale Securities, Total Fair Value | 318,552 | 272,017
Temporarily Impaired Available-for-Sale Securities, Total Unrealized Loss | 6,447 | 2,982
Debt Securities | Capital Trust Notes |  |
Schedule of Investments [Line Items] |  |
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Fair Value | 33,393 | 37,525
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Unrealized Loss | 10,500 | 6,306
Temporarily Impaired Available-for-Sale Securities, Total Fair Value | 33,393 | 37,525
Temporarily Impaired Available-for-Sale Securities, Total Unrealized Loss | $ 10,500 | 6,306
Equity Securities |  |
Schedule of Investments [Line Items] |  |
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Fair Value |  | 11,633
Temporarily Impaired Available-for-Sale Securities, Twelve Months or Longer Unrealized Loss |  | 173
Temporarily Impaired Available-for-Sale Securities, Total Fair Value |  | 11,633
Temporarily Impaired Available-for-Sale Securities, Total Unrealized Loss |  | $ 173

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
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_ScheduleOfInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=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_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_InvestmentTypeAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
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_InvestmentTypeAxis=us-gaap_MunicipalBondsMember
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_CorporateNoteSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |