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Securities - Available for Sale Securities With Gross Unrealized Losses and Their Fair Value (Details) $ in Thousands | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
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Securities have been in a continuous unrealized loss position, number of positions | 42 | 62
Securities have been in a continuous unrealized loss position, fair value | $ 275,453 | $ 441,043
Securities have been in a continuous unrealized loss position, unrealized losses | 31,551 | 10,101
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 96,682 | 146,957
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 3,797 | 1,363
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 178,771 | 294,086
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 27,754 | $ 8,738
Other Debt Obligations [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 29 | 29
Securities have been in a continuous unrealized loss position, fair value | $ 199,225 | $ 222,187
Securities have been in a continuous unrealized loss position, unrealized losses | 31,137 | 8,162
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 32,141 | 25,451
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 3,426 | 108
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 167,084 | 196,736
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 27,711 | $ 8,054
FNMA [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 1 | 8
Securities have been in a continuous unrealized loss position, fair value | $ 8,812 | $ 67,618
Securities have been in a continuous unrealized loss position, unrealized losses | 24 | 426
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 0 | 19,073
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 0 | 138
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 8,812 | 48,545
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 24 | $ 288
Collateralized Mortgage Backed Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 13 | 33
Securities have been in a continuous unrealized loss position, fair value | $ 76,228 | $ 218,856
Securities have been in a continuous unrealized loss position, unrealized losses | 414 | 1,939
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 64,541 | 121,506
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 371 | 1,255
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 11,687 | 97,350
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 43 | $ 684
Corporate Debt Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 16 | 16
Securities have been in a continuous unrealized loss position, fair value | $ 111,853 | $ 123,050
Securities have been in a continuous unrealized loss position, unrealized losses | 18,148 | 6,950
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 9,620 | 0
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 380 | 0
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 102,233 | 123,050
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 17,768 | $ 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 | $ 87,372 | $ 99,137
Securities have been in a continuous unrealized loss position, unrealized losses | 12,989 | 1,212
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 22,521 | 25,451
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 3,046 | 108
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 64,851 | 73,686
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 9,943 | $ 1,104
REMIC and CMO [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 12 | 23
Securities have been in a continuous unrealized loss position, fair value | $ 67,416 | $ 120,989
Securities have been in a continuous unrealized loss position, unrealized losses | 390 | 1,440
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 64,541 | 102,384
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 371 | 1,117
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 2,875 | 18,605
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 19 | $ 323
FHLMC [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 |  | $ 30,200
Securities have been in a continuous unrealized loss position, unrealized losses |  | 73
Securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 0
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | 0
Securities have been in a continuous unrealized loss position, 12 months or more, fair value |  | 30,200
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses |  | $ 73
GNMA [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 |  | $ 49
Securities have been in a continuous unrealized loss position, unrealized losses |  | 0
Securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 49
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | 0
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

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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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- 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 less 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 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 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 less 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 + Details
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