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Securities - Available for Sale Securities With Gross Unrealized Losses and Their Fair Value (Details) $ in Thousands | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
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Held-to-maturity securities have been in a continuous unrealized loss position, number of positions |  | 2
Held-to-maturity securities have been in a continuous unrealized loss position, fair value |  | $ 27,306
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss |  | 2,144
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value |  | 27,306
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses |  | $ 2,144
Securities have been in a continuous unrealized loss position, number of positions | 62 | 87
Securities have been in a continuous unrealized loss position, fair value | $ 441,043 | $ 589,648
Securities have been in a continuous unrealized loss position, unrealized losses | 10,101 | 24,131
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 146,957 | 143,932
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 1,363 | 2,845
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 294,086 | 445,716
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 8,738 | $ 21,286
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 |  | $ 19,940
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss |  | 1,557
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value |  | 19,940
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses |  | $ 1,557
Securities have been in a continuous unrealized loss position, number of positions |  | 3
Securities have been in a continuous unrealized loss position, fair value |  | $ 4,220
Securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | $ 4,220
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 |  | $ 19,940
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss |  | 1,557
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value |  | 19,940
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses |  | $ 1,557
Securities have been in a continuous unrealized loss position, number of positions | 29 | 30
Securities have been in a continuous unrealized loss position, fair value | $ 222,187 | $ 209,507
Securities have been in a continuous unrealized loss position, unrealized losses | 8,162 | 13,110
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 25,451 | 110,085
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 108 | 2,533
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 196,736 | 99,422
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 8,054 | $ 10,577
FNMA [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 |  | $ 7,366
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss |  | 587
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value |  | 7,366
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses |  | $ 587
Securities have been in a continuous unrealized loss position, number of positions | 8 | 14
Securities have been in a continuous unrealized loss position, fair value | $ 67,618 | $ 85,046
Securities have been in a continuous unrealized loss position, unrealized losses | 426 | 2,448
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 19,073 | 6,372
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 138 | 17
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 48,545 | 78,674
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 288 | $ 2,431
Collateralized Mortgage Backed 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 |  | $ 7,366
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss |  | 587
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value |  | 7,366
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses |  | $ 587
Securities have been in a continuous unrealized loss position, number of positions | 33 | 57
Securities have been in a continuous unrealized loss position, fair value | $ 218,856 | $ 380,141
Securities have been in a continuous unrealized loss position, unrealized losses | 1,939 | 11,021
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 121,506 | 33,847
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 1,255 | 312
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 97,350 | 346,294
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 684 | $ 10,709
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 | $ 123,050 | $ 118,535
Securities have been in a continuous unrealized loss position, unrealized losses | 6,950 | 11,465
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 0 | 19,113
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 0 | 888
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 123,050 | 99,422
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 6,950 | $ 10,577
Collateralized Loan Obligations [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 13 | 11
Securities have been in a continuous unrealized loss position, fair value | $ 99,137 | $ 86,752
Securities have been in a continuous unrealized loss position, unrealized losses | 1,212 | 1,645
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 25,451 | 86,752
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 108 | $ 1,645
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 73,686 |
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 1,104 |
REMIC and CMO [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 23 | 39
Securities have been in a continuous unrealized loss position, fair value | $ 120,989 | $ 243,756
Securities have been in a continuous unrealized loss position, unrealized losses | 1,440 | 7,177
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 102,384 | 17,308
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 1,117 | 200
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 18,605 | 226,448
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 323 | $ 6,977
FHLMC [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 1 | 3
Securities have been in a continuous unrealized loss position, fair value | $ 30,200 | $ 51,288
Securities have been in a continuous unrealized loss position, unrealized losses | 73 | 1,396
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 0 | 10,116
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 0 | 95
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 30,200 | 41,172
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ 73 | $ 1,301
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 | $ 49 | $ 51
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 | $ 51
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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