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Investment Securities - Aggregate Unrealized Losses and Fair Value (Details) $ in Thousands | Dec. 31, 2024 USD ($) security | Dec. 31, 2023 USD ($) security
--- | --- | ---
Number of Securities |  |
Less than 12 months | security | 38 | 20
12 months or longer | security | 261 | 301
Total | security | 299 | 321
Fair Value |  |
Less than 12 months | $ 231,698 | $ 115,815
12 months or longer | 1,452,638 | 1,738,084
Total | 1,684,336 | 1,853,899
Gross Unrealized Losses |  |
Less than 12 months | (7,324) | (2,770)
12 months or longer | (292,450) | (288,178)
Total | $ (299,774) | $ (290,948)
U.S. Treasury securities |  |
Number of Securities |  |
Less than 12 months | security |  | 0
12 months or longer | security |  | 1
Total | security |  | 1
Fair Value |  |
Less than 12 months |  | $ 0
12 months or longer |  | 3,963
Total |  | 3,963
Gross Unrealized Losses |  |
Less than 12 months |  | 0
12 months or longer |  | (35)
Total |  | $ (35)
Agency securities |  |
Number of Securities |  |
Less than 12 months | security | 0 | 0
12 months or longer | security | 1 | 1
Total | security | 1 | 1
Fair Value |  |
Less than 12 months | $ 0 | $ 0
12 months or longer | 3,957 | 3,900
Total | 3,957 | 3,900
Gross Unrealized Losses |  |
Less than 12 months | 0 | 0
12 months or longer | (43) | (100)
Total | $ (43) | $ (100)
Collateralized mortgage obligations |  |
Number of Securities |  |
Less than 12 months | security | 7 | 3
12 months or longer | security | 95 | 115
Total | security | 102 | 118
Fair Value |  |
Less than 12 months | $ 59,661 | $ 19,800
12 months or longer | 636,472 | 717,662
Total | 696,133 | 737,462
Gross Unrealized Losses |  |
Less than 12 months | (527) | (378)
12 months or longer | (138,898) | (140,901)
Total | $ (139,425) | $ (141,279)
Residential |  |
Number of Securities |  |
Less than 12 months | security | 2 | 0
12 months or longer | security | 63 | 65
Total | security | 65 | 65
Fair Value |  |
Less than 12 months | $ 19,183 | $ 0
12 months or longer | 367,877 | 420,298
Total | 387,060 | 420,298
Gross Unrealized Losses |  |
Less than 12 months | (1,029) | 0
12 months or longer | (85,010) | (79,133)
Total | $ (86,039) | $ (79,133)
Commercial |  |
Number of Securities |  |
Less than 12 months | security | 10 | 6
12 months or longer | security | 57 | 53
Total | security | 67 | 59
Fair Value |  |
Less than 12 months | $ 70,728 | $ 53,255
12 months or longer | 340,123 | 331,450
Total | 410,851 | 384,705
Gross Unrealized Losses |  |
Less than 12 months | (2,406) | (2,129)
12 months or longer | (53,672) | (51,303)
Total | $ (56,078) | $ (53,432)
Asset-backed securities |  |
Number of Securities |  |
Less than 12 months | security | 1 | 0
12 months or longer | security | 0 | 18
Total | security | 1 | 18
Fair Value |  |
Less than 12 months | $ 5,007 | $ 0
12 months or longer | 0 | 149,670
Total | 5,007 | 149,670
Gross Unrealized Losses |  |
Less than 12 months | (14) | 0
12 months or longer | 0 | (1,322)
Total | $ (14) | $ (1,322)
Corporate securities |  |
Number of Securities |  |
Less than 12 months | security | 0 | 0
12 months or longer | security | 6 | 6
Total | security | 6 | 6
Fair Value |  |
Less than 12 months | $ 0 | $ 0
12 months or longer | 20,694 | 19,434
Total | 20,694 | 19,434
Gross Unrealized Losses |  |
Less than 12 months | 0 | 0
12 months or longer | (2,560) | (3,868)
Total | $ (2,560) | $ (3,868)
Municipal securities |  |
Number of Securities |  |
Less than 12 months | security | 18 | 11
12 months or longer | security | 39 | 42
Total | security | 57 | 53
Fair Value |  |
Less than 12 months | $ 77,119 | $ 42,760
12 months or longer | 83,515 | 91,707
Total | 160,634 | 134,467
Gross Unrealized Losses |  |
Less than 12 months | (3,348) | (263)
12 months or longer | (12,267) | (11,516)
Total | $ (15,615) | $ (11,779)

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