DEBT SECURITIES - Schedule of Maturity of Debt Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Amortized Cost
Due in one year or less	$ 27,262
Due after one year through five years	52,667
Due after five years through ten years	446,705
Due after ten years	1,868,030
Amortized Cost	2,394,664	$ 2,039,952
Fair Value
Due in one year or less	27,134
Due after one year through five years	50,135
Due after five years through ten years	431,576
Due after ten years	1,708,943
Fair Value	2,217,788	1,810,221
Amortized Cost
Due in one year or less	16,804
Due after one year through five years	59,889
Due after five years through ten years	14,710
Due after ten years	711,562
Amortized Cost	802,965	826,630
Fair Value
Due in one year or less	16,708
Due after one year through five years	57,757
Due after five years through ten years	13,127
Due after ten years	582,940
Fair Value	$ 670,532	$ 675,053