Investment Securities - Contractual maturities of investment securities (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Held-to-maturity, Amortized Cost
Due after five years through ten years	$ 43,292
Due after ten years	58,973
Total Held-to-maturity Securities	102,265
Held-to-maturity, Fair Value
Due after five years through ten years	38,219
Due after ten years	50,643
Total Held-to-maturity Securities	88,862
Available-for-sale, Amortized Cost
Due in one year or less	1,062
Due after one year through five years	93,701
Due after five years through ten years	154,748
Due after ten years	137,442
Total Available-for-sale Securities	386,953
Available-for-sale, Fair Value
Due in one year or less	1,062
Due after one year through five years	89,714
Due after five years through ten years	148,717
Due after ten years	125,641
Total Available-for-sale Securities	$ 365,134