Investment Securities, Contractual and Expected Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Maturity in years [Abstract]
Due in one year or less	$ 52,471
Due after one year through five years	184,189
Due after five years through ten years	38,225
Due after ten years	32,411
Subtotal	307,296
Mortgage-backed securities & Collateralized mortgage obligations	376,488
Amortized cost	683,784	$ 636,092
Maturity in years [Abstract]
Due in one year or less	51,254
Due after one year through five years	171,618
Due after five years through ten years	34,754
Due after ten years	28,426
Subtotal	286,052
MBS & CMO	332,040
Estimated fair value	$ 618,092	$ 632,213