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Investment Securities - Unrealized Losses (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value |  |
Less than 12 Months | $ 954,346 | $ 334,687
12 Months or Longer | 57,820 | 32,267
Total | 1,012,166 | 366,954
Unrealized Losses |  |
Less than 12 Months | (74,450) | (4,435)
12 Months or Longer | (7,196) | (403)
Total | (81,646) | (4,838)
US Treasury and Government [Member] |  |
Fair Value |  |
Less than 12 Months | 64,200 | 14,828
12 Months or Longer | 1,468 | 0
Total | 65,668 | 14,828
Unrealized Losses |  |
Less than 12 Months | (2,995) | (176)
12 Months or Longer | (249) | 0
Total | (3,244) | (176)
Municipal securities |  |
Fair Value |  |
Less than 12 Months | 106,205 | 29,774
12 Months or Longer | 15,712 | 9,351
Total | 121,917 | 39,125
Unrealized Losses |  |
Less than 12 Months | (11,287) | (619)
12 Months or Longer | (3,082) | (235)
Total | (14,369) | (854)
Residential CMO and MBS |  |
Fair Value |  |
Less than 12 Months | 352,074 | 204,039
12 Months or Longer | 31,008 | 19,862
Total | 383,082 | 223,901
Unrealized Losses |  |
Less than 12 Months | (32,446) | (2,470)
12 Months or Longer | (3,371) | (123)
Total | (35,817) | (2,593)
Commercial CMO and MBS |  |
Fair Value |  |
Less than 12 Months | 406,835 | 83,283
12 Months or Longer | 8,711 | 1,936
Total | 415,546 | 85,219
Unrealized Losses |  |
Less than 12 Months | (27,145) | (1,161)
12 Months or Longer | (473) | (38)
Total | (27,618) | (1,199)
Corporate Debt Securities [Member] |  |
Fair Value |  |
Less than 12 Months | 5,978 |
12 Months or Longer | 0 |
Total | 5,978 |
Unrealized Losses |  |
Less than 12 Months | (25) |
12 Months or Longer | 0 |
Total | (25) |
Other asset-backed securities |  |
Fair Value |  |
Less than 12 Months | 19,054 | 2,763
12 Months or Longer | 921 | 1,118
Total | 19,975 | 3,881
Unrealized Losses |  |
Less than 12 Months | (552) | (9)
12 Months or Longer | (21) | (7)
Total | $ (573) | $ (16)

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