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DEBT SECURITIES - Schedule of Debt Securities in an Unrealized or Unrecognized Loss Position (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair Value |  |
Less than 12 months | $ 354,946 | $ 185,148
12 months or more | 1,013,103 | 1,281,595
Total | 1,368,049 | 1,466,743
Unrealized Losses |  |
Less than 12 months | (8,246) | (895)
12 months or more | (173,986) | (229,430)
Total | (182,232) | (230,325)
Fair Value |  |
12 months or more | 670,532 | 675,053
Total | 670,532 | 675,053
Unrecognized Losses |  |
12 months or more | (132,433) | (151,577)
Total | (132,433) | (151,577)
Obligations of U.S. government corporations and agencies |  |
Fair Value |  |
Less than 12 months | 94,032 | 0
12 months or more | 152 | 1,328
Total | 94,184 | 1,328
Unrealized Losses |  |
Less than 12 months | (403) | 0
12 months or more | (1) | (8)
Total | (404) | (8)
Obligations of states and political subdivisions |  |
Fair Value |  |
Less than 12 months | 126,519 | 11,234
12 months or more | 96,547 | 119,723
Total | 223,066 | 130,957
Unrealized Losses |  |
Less than 12 months | (7,390) | (209)
12 months or more | (11,585) | (16,527)
Total | (18,975) | (16,736)
Asset-backed securities |  |
Fair Value |  |
Less than 12 months |  | 14,997
12 months or more |  | 0
Total |  | 14,997
Unrealized Losses |  |
Less than 12 months |  | (3)
12 months or more |  | 0
Total |  | (3)
Commercial mortgage-backed securities |  |
Fair Value |  |
Less than 12 months | 7,914 | 6,238
12 months or more | 72,293 | 85,936
Total | 80,207 | 92,174
Unrealized Losses |  |
Less than 12 months | (62) | (42)
12 months or more | (12,235) | (15,089)
Total | (12,297) | (15,131)
Fair Value |  |
12 months or more | 336,629 | 338,288
Total | 336,629 | 338,288
Unrecognized Losses |  |
12 months or more | (70,772) | (77,242)
Total | (70,772) | (77,242)
Residential mortgage-backed securities |  |
Fair Value |  |
Less than 12 months | 125,548 | 152,081
12 months or more | 796,367 | 930,642
Total | 921,915 | 1,082,723
Unrealized Losses |  |
Less than 12 months | (385) | (640)
12 months or more | (147,433) | (191,259)
Total | (147,818) | (191,899)
Fair Value |  |
12 months or more | 333,903 | 336,765
Total | 333,903 | 336,765
Unrecognized Losses |  |
12 months or more | (61,661) | (74,335)
Total | (61,661) | (74,335)
Corporate debt securities |  |
Fair Value |  |
Less than 12 months | 933 | 598
12 months or more | 47,744 | 143,966
Total | 48,677 | 144,564
Unrealized Losses |  |
Less than 12 months | (6) | (1)
12 months or more | (2,732) | (6,547)
Total | $ (2,738) | $ (6,548)

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