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Securities - Available for Sale Securities With Gross Unrealized Losses and Their Fair Value (Details) $ in Thousands | Sep. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
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Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 1 |
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 20,819 |
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | 157 |
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value | 20,819 |
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 157 |
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 0 |
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 0 |
Securities have been in a continuous unrealized loss position, number of positions | 61 | 37
Securities have been in a continuous unrealized loss position, fair value | $ 486,946 | $ 290,820
Securities have been in a continuous unrealized loss position, unrealized losses | 8,006 | 7,766
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 436,825 | 76,729
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 6,861 | 186
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 50,121 | 214,091
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 1,145 | $ 7,580
US States and Political Subdivisions Debt Securities [Member] |  |
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 1 |
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 20,819 |
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | 157 |
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value | 20,819 |
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 157 |
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 0 |
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 0 |
US Government Agencies Debt Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 1 | 1
Securities have been in a continuous unrealized loss position, fair value | $ 4,489 | $ 4,988
Securities have been in a continuous unrealized loss position, unrealized losses | 3 | 1
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 4,489 | 4,988
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 3 | 1
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 0 | 0
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 0 | $ 0
Corporate Debt Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 11 | 14
Securities have been in a continuous unrealized loss position, fair value | $ 80,792 | $ 113,734
Securities have been in a continuous unrealized loss position, unrealized losses | 1,654 | 6,266
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 51,698 | 0
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 748 | 0
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 29,094 | 113,734
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 906 | $ 6,266
Collateralized Loan Obligations [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 3 | 13
Securities have been in a continuous unrealized loss position, fair value | $ 21,027 | $ 99,199
Securities have been in a continuous unrealized loss position, unrealized losses | 239 | 1,363
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 0 | 7,441
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 0 | 52
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 21,027 | 91,758
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 239 | $ 1,311
Other Debt Obligations [Member] |  |
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 1 |
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 20,819 |
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | 157 |
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value | 20,819 |
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 157 |
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 0 |
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 0 |
Securities have been in a continuous unrealized loss position, number of positions | 15 | 28
Securities have been in a continuous unrealized loss position, fair value | $ 106,308 | $ 217,921
Securities have been in a continuous unrealized loss position, unrealized losses | 1,896 | 7,630
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 56,187 | 12,429
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 751 | 53
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 50,121 | 205,492
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 1,145 | $ 7,577
Collateralized Mortgage Backed Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 46 | 9
Securities have been in a continuous unrealized loss position, fair value | $ 380,638 | $ 72,899
Securities have been in a continuous unrealized loss position, unrealized losses | 6,110 | 136
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 380,638 | 64,300
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 6,110 | 133
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 0 | 8,599
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 0 | $ 3
REMIC and CMO [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 12 |
Securities have been in a continuous unrealized loss position, fair value | $ 110,359 |
Securities have been in a continuous unrealized loss position, unrealized losses | 1,981 |
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 110,359 |
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 1,981 |
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 0 |
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 0 |
GNMA [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 2 | 1
Securities have been in a continuous unrealized loss position, fair value | $ 10,196 | $ 10,341
Securities have been in a continuous unrealized loss position, unrealized losses | 312 | 22
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 10,196 | 10,341
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 312 | 22
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 0 | 0
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 0 | $ 0
FNMA [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 17 | 5
Securities have been in a continuous unrealized loss position, fair value | $ 136,324 | $ 32,463
Securities have been in a continuous unrealized loss position, unrealized losses | 1,758 | 31
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 136,324 | 23,864
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 1,758 | 28
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 0 | 8,599
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 0 | $ 3
FHLMC [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 15 | 3
Securities have been in a continuous unrealized loss position, fair value | $ 123,759 | $ 30,095
Securities have been in a continuous unrealized loss position, unrealized losses | 2,059 | 83
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 123,759 | 30,095
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 2,059 | 83
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 0 | 0
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 0 | $ 0

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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