Investment Securities, Contractual Maturity (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Amortized Cost [Abstract]
One year or less	$ 5,312
After one year through five years	21,418
After five years through ten years	25,492
After ten years	163,907
Amortized cost, excluding securities without single maturity date	216,129
Fair Value [Abstract]
One year or less	5,274
After one year through five years	20,600
After five years through ten years	23,196
After ten years	128,384
Fair value, excluding investment securities not due at a single maturity date	177,454
Amortized Cost [Abstract]
One year or less	883
After one year through five years	7,484
After five years through ten years	28,907
After ten years	815,391
Fair value, excluding securities without single maturity date	852,665
Fair Value [Abstract]
One year or less	883
After one year through five years	7,324
After five years through ten years	26,852
After ten years	655,863
Fair value, excluding investment securities without single maturity date	$ 690,922