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Investment Securities - Unrealized Losses (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value |  |
Less than 12 Months | $ 1,148,864 | $ 334,687
12 Months or Longer | 181,229 | 32,267
Total | 1,330,093 | 366,954
Unrealized Losses |  |
Less than 12 Months | (94,682) | (4,435)
12 Months or Longer | (40,721) | (403)
Total | (135,403) | (4,838)
US Treasury and Government [Member] |  |
Fair Value |  |
Less than 12 Months | 58,025 | 14,828
12 Months or Longer | 5,724 | 0
Total | 63,749 | 14,828
Unrealized Losses |  |
Less than 12 Months | (4,176) | (176)
12 Months or Longer | (987) | 0
Total | (5,163) | (176)
Municipal securities |  |
Fair Value |  |
Less than 12 Months | 148,054 | 29,774
12 Months or Longer | 27,731 | 9,351
Total | 175,785 | 39,125
Unrealized Losses |  |
Less than 12 Months | (12,031) | (619)
12 Months or Longer | (9,074) | (235)
Total | (21,105) | (854)
Residential CMO and MBS |  |
Fair Value |  |
Less than 12 Months | 308,142 | 204,039
12 Months or Longer | 128,304 | 19,862
Total | 436,446 | 223,901
Unrealized Losses |  |
Less than 12 Months | (28,668) | (2,470)
12 Months or Longer | (27,298) | (123)
Total | (55,966) | (2,593)
Commercial CMO and MBS |  |
Fair Value |  |
Less than 12 Months | 611,399 | 83,283
12 Months or Longer | 18,636 | 1,936
Total | 630,035 | 85,219
Unrealized Losses |  |
Less than 12 Months | (49,077) | (1,161)
12 Months or Longer | (3,347) | (38)
Total | (52,424) | (1,199)
Corporate Debt Securities [Member] |  |
Fair Value |  |
Less than 12 Months | 5,834 |
12 Months or Longer | 0 |
Total | 5,834 |
Unrealized Losses |  |
Less than 12 Months | (167) |
12 Months or Longer | 0 |
Total | (167) |
Other asset-backed securities |  |
Fair Value |  |
Less than 12 Months | 17,410 | 2,763
12 Months or Longer | 834 | 1,118
Total | 18,244 | 3,881
Unrealized Losses |  |
Less than 12 Months | (563) | (9)
12 Months or Longer | (15) | (7)
Total | $ (578) | $ (16)

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