SECURITIES - Contractual maturities of debt securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Amortized Cost
Due in one year or less	$ 8,256
Due after one but within five years	45,469
Due after five but within ten years	121,980
Due after ten years	350,802
Total of securities having specified maturity period	526,507
Mortgage-backed securities and collateralized mortgage obligations	835,290
Amortized Cost	1,361,797	$ 1,412,498
Fair Value
Due in one year or less	8,135
Due after one but within five years	44,008
Due after five but within ten years	117,935
Due after ten years	307,905
Total of securities having specified maturities period	477,983
Mortgage-backed securities and collateralized mortgage obligations	718,007
TOTAL	1,195,990	1,259,137
Gains and losses from investment sales/calls realized	$ 103	$ (1)