Investment Securities, Contractual Maturity (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Amortized Cost [Abstract]
One year or less	$ 5,290
After one year through five years	5,120
After five years through ten years	5,411
After ten years	4,908
Amortized cost, excluding securities without single maturity date	20,729
Securities not due at a single maturity date	254,622
Fair Value [Abstract]
One year or less	5,274
After one year through five years	4,842
After five years through ten years	5,168
After ten years	4,945
Fair value, excluding investment securities not due at a single maturity date	20,229
Securities not due at a single maturity date	225,338
Amortized Cost [Abstract]
One year or less	700
After one year through five years	7,089
After five years through ten years	15,948
After ten years	38,722
Fair value, excluding securities without single maturity date	62,459
Securities not due at a single maturity date	868,383
Fair Value [Abstract]
One year or less	700
After one year through five years	7,074
After five years through ten years	15,926
After ten years	38,641
Fair value, excluding investment securities without single maturity date	62,341
Securities not due at a single maturity date	754,834
Mortgage-backed Securities [Member]
Amortized Cost [Abstract]
Securities not due at a single maturity date	232,368
Fair Value [Abstract]
Securities not due at a single maturity date	203,607
Amortized Cost [Abstract]
Securities not due at a single maturity date	721,510
Fair Value [Abstract]
Securities not due at a single maturity date	616,784
Collateralized Mortgage Obligations [Member]
Amortized Cost [Abstract]
Securities not due at a single maturity date	1,525
Fair Value [Abstract]
Securities not due at a single maturity date	1,502
Amortized Cost [Abstract]
Securities not due at a single maturity date	84,414
Fair Value [Abstract]
Securities not due at a single maturity date	$ 75,709