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Securities - Available for Sale Securities With Gross Unrealized Losses and Their Fair Value (Details) $ in Thousands | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
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Securities have been in a continuous unrealized loss position, number of positions | 37 | 62
Securities have been in a continuous unrealized loss position, fair value | $ 290,820 | $ 441,043
Securities have been in a continuous unrealized loss position, unrealized losses | 7,766 | 10,101
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 76,729 | 146,957
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 186 | 1,363
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 214,091 | 294,086
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 7,580 | $ 8,738
US Government Agencies Debt Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 1 |
Securities have been in a continuous unrealized loss position, fair value | $ 4,988 |
Securities have been in a continuous unrealized loss position, unrealized losses | 1 |
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 4,988 |
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 1 |
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 |
Corporate Debt Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 14 | 16
Securities have been in a continuous unrealized loss position, fair value | $ 113,734 | $ 123,050
Securities have been in a continuous unrealized loss position, unrealized losses | 6,266 | 6,950
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 113,734 | 123,050
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 6,266 | $ 6,950
Collateralized Loan Obligations [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 13 | 13
Securities have been in a continuous unrealized loss position, fair value | $ 99,199 | $ 99,137
Securities have been in a continuous unrealized loss position, unrealized losses | 1,363 | 1,212
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 7,441 | 25,451
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 52 | 108
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 91,758 | 73,686
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 1,311 | $ 1,104
Other Debt Obligations [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 28 | 29
Securities have been in a continuous unrealized loss position, fair value | $ 217,921 | $ 222,187
Securities have been in a continuous unrealized loss position, unrealized losses | 7,630 | 8,162
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 12,429 | 25,451
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 53 | 108
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 205,492 | 196,736
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 7,577 | $ 8,054
Collateralized Mortgage Backed Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 9 | 33
Securities have been in a continuous unrealized loss position, fair value | $ 72,899 | $ 218,856
Securities have been in a continuous unrealized loss position, unrealized losses | 136 | 1,939
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 64,300 | 121,506
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 133 | 1,255
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 8,599 | 97,350
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 3 | $ 684
REMIC and CMO [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions |  | 23
Securities have been in a continuous unrealized loss position, fair value |  | $ 120,989
Securities have been in a continuous unrealized loss position, unrealized losses |  | 1,440
Securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 102,384
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | 1,117
Securities have been in a continuous unrealized loss position, 12 months or more, fair value |  | 18,605
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses |  | $ 323
GNMA [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 | $ 10,341 | $ 49
Securities have been in a continuous unrealized loss position, unrealized losses | 22 |
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 10,341 | $ 49
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 22 |
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 |
FNMA [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 5 | 8
Securities have been in a continuous unrealized loss position, fair value | $ 32,463 | $ 67,618
Securities have been in a continuous unrealized loss position, unrealized losses | 31 | 426
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 23,864 | 19,073
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 28 | 138
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 8,599 | 48,545
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 3 | $ 288
FHLMC [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 3 | 1
Securities have been in a continuous unrealized loss position, fair value | $ 30,095 | $ 30,200
Securities have been in a continuous unrealized loss position, unrealized losses | 83 | 73
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 30,095 |
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 83 |
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 0 | 30,200
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 0 | $ 73

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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=118955579&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=118939692&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=118942371&loc=SL82922954-210456 + Details
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- Definition Amount of accumulated unrealized loss on 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 12 months or longer, 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 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27337-111563 Reference 2: 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=118955579&loc=SL82922890-210455 + Details
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