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Securities - Schedule of Unrealized Loss and Fair Value on Investments (Details) $ in Thousands | Sep. 30, 2025 USD ($) security | Dec. 31, 2024 USD ($) security
--- | --- | ---
Fair Value |  |
Less Than 12 Months | $ 221,208 | $ 717,899
12 Months or Longer | 1,027,837 | 978,673
Total | 1,249,045 | 1,696,572
Unrealized Losses |  |
Less Than 12 Months | (2,249) | (7,996)
12 Months or Longer | (152,884) | (203,342)
Total | $ (155,133) | $ (211,338)
Number of individual securities | security | 337 | 377
U.S. Treasury securities and obligations of U.S. government agencies |  |
Fair Value |  |
Less Than 12 Months | $ 313 | $ 4,825
12 Months or Longer | 14,493 | 18,060
Total | 14,806 | 22,885
Unrealized Losses |  |
Less Than 12 Months | (2) | (13)
12 Months or Longer | (430) | (509)
Total | (432) | (522)
Residential mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities |  |
Fair Value |  |
Less Than 12 Months | 175,515 | 648,967
12 Months or Longer | 786,425 | 739,363
Total | 961,940 | 1,388,330
Unrealized Losses |  |
Less Than 12 Months | (2,115) | (7,578)
12 Months or Longer | (139,082) | (182,958)
Total | (141,197) | (190,536)
Commercial mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities |  |
Fair Value |  |
Less Than 12 Months | 274 | 13,200
12 Months or Longer | 95,067 | 107,041
Total | 95,341 | 120,241
Unrealized Losses |  |
Less Than 12 Months | 0 | (222)
12 Months or Longer | (6,471) | (10,061)
Total | (6,471) | (10,283)
Private mortgage-backed securities and collateralized mortgage obligations |  |
Fair Value |  |
Less Than 12 Months | 0 | 7,178
12 Months or Longer | 81,657 | 101,242
Total | 81,657 | 108,420
Unrealized Losses |  |
Less Than 12 Months | 0 | (16)
12 Months or Longer | (5,582) | (8,366)
Total | (5,582) | (8,382)
CLOs |  |
Fair Value |  |
Less Than 12 Months | 45,106 | 43,410
12 Months or Longer | 44,532 | 7,596
Total | 89,638 | 51,006
Unrealized Losses |  |
Less Than 12 Months | (132) | (152)
12 Months or Longer | (177) | (14)
Total | (309) | (166)
Obligations of state and political subdivisions |  |
Fair Value |  |
Less Than 12 Months | 0 | 319
12 Months or Longer | 5,663 | 5,371
Total | 5,663 | 5,690
Unrealized Losses |  |
Less Than 12 Months | 0 | (15)
12 Months or Longer | (1,142) | (1,434)
Total | $ (1,142) | $ (1,449)

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