SECURITIES - Schedule of Securities By Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
Due in one year or less	$ 695
Due after one year through five years	7,805
Due after five years through ten years	46,433
Due after ten years	638,445
Total available-for-sale securities, gross	693,378
Mortgage-backed securities	511,037
Amortized Cost	1,204,415	$ 1,226,319
Fair Value
Due in one year or less	695
Due after one year through five years	7,149
Due after five years through ten years	43,245
Due after ten years	531,374
Total available-for-sale securities, gross	582,463
Mortgage-backed securities	432,018
Total securities available-for-sale	1,014,481	1,051,728
Amortized Cost
Due in one year or less	0
Due after one year through five years	0
Due after five years through ten years	0
Due after ten years	130,335
Total held-to-maturity securities, gross	130,335
Mortgage-backed securities	0
Amortized Cost	130,335
Fair Value
Due in one year or less	0
Due after one year through five years	0
Due after five years through ten years	0
Due after ten years	115,467
Total held-to-maturity securities, gross	115,467
Mortgage-backed securities	0
Fair Value	$ 115,467	$ 119,215