INVESTMENT SECURITIES - Schedule of Amortized Cost and Estimated Fair Value of Debt Securities, Available for Sale, by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Amortized Cost
Due in one year or less	$ 309,442
Due from one year to five years	474,765
Due from five to ten years	115,347
Due after ten years	11,100
Mortgage-backed securities	797,542
Amortized Cost	1,708,196	$ 1,447,637
Estimated Fair Value
Due in one year or less	307,875
Due from one year to five years	471,711
Due from five to ten years	113,511
Due after ten years	9,866
Mortgage-backed securities	768,297
Estimated Fair Value	1,671,260	1,402,944
Amortized Cost
Due in one year or less	0
Due from one year to five years	0
Due from five to ten years	0
Due after ten years	33,623
Mortgage-backed securities	131,054
Amortized Cost	164,677	141,512
Estimated Fair Value
Due in one year or less	0
Due from one year to five years	0
Due from five to ten years	0
Due after ten years	27,409
Mortgage-backed securities	116,619
Estimated Fair Value	$ 144,028	$ 122,731