DEBT SECURITIES - Schedule of Maturity of Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Amortized Cost
Due in one year or less	$ 68,340
Due after one year through five years	67,386
Due after five years through ten years	452,231
Due after ten years	1,876,284
Amortized Cost	2,464,241	$ 2,039,952
Fair Value
Due in one year or less	68,099
Due after one year through five years	64,779
Due after five years through ten years	434,831
Due after ten years	1,706,165
Fair Value	2,273,874	1,810,221
Amortized Cost
Due in one year or less	17,862
Due after one year through five years	60,943
Due after five years through ten years	14,700
Due after ten years	721,897
Amortized Cost	815,402	826,630
Fair Value
Due in one year or less	17,665
Due after one year through five years	58,316
Due after five years through ten years	12,929
Due after ten years	589,560
Fair Value	$ 678,470	$ 675,053