INVESTMENT SECURITIES, Contractual or Expected Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Maturity in years [Abstract]
Due in one year or less	$ 81,976
Due after one year through five years	154,651
Due after five years through ten years	22,207
Due after ten years	26,851
Subtotal	285,685
Mortgage-backed securities & Collateralized mortgage obligations	364,373
Amortized cost	650,058	$ 683,784
Maturity in years [Abstract]
Due in one year or less	80,271
Due after one year through five years	143,425
Due after five years through ten years	19,626
Due after ten years	23,501
Subtotal	266,823
Mortgage-backed securities & Collateralized mortgage obligations	320,837
Estimated fair value	$ 587,660	$ 618,092