Securities - Amortized Cost and Fair Value of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Amortized Cost
Due in one year or less	$ 43,513
Due after one year through five years	63,849
Due after five years through ten years	106,881
Due after ten years	20,849
Debt Securities Available-for-Sale With Maturities	235,092
Total Debt Securities, Available-for-sale, Amortized Cost	900,235	$ 737,005
Fair Value
Due in one year or less	44,027
Due after one year through five years	66,363
Due after five years through ten years	107,427
Due after ten years	22,947
Debt Securities Available-for-Sale With Maturities	240,764
Total Debt Securities Available-for-Sale	909,651	770,393
Collateralized mortgage obligations of U.S. government corporations and agencies
Amortized Cost
Debt Securities Available-for-Sale With Maturities	270,696
Total Debt Securities, Available-for-sale, Amortized Cost	270,696	202,975
Fair Value
Debt Securities Available-for-Sale With Maturities	270,294
Total Debt Securities Available-for-Sale	270,294	209,296
Residential mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Debt Securities Available-for-Sale With Maturities	57,029
Total Debt Securities, Available-for-sale, Amortized Cost	57,029	66,960
Fair Value
Debt Securities Available-for-Sale With Maturities	56,793
Total Debt Securities Available-for-Sale	56,793	67,778
Commercial mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Debt Securities Available-for-Sale With Maturities	336,918
Total Debt Securities, Available-for-sale, Amortized Cost	336,918	258,875
Fair Value
Debt Securities Available-for-Sale With Maturities	341,300
Total Debt Securities Available-for-Sale	341,300	273,681
Corporate Obligations
Amortized Cost
Debt Securities Available-for-Sale With Maturities	500
Total Debt Securities, Available-for-sale, Amortized Cost	500	2,021
Fair Value
Debt Securities Available-for-Sale With Maturities	500
Total Debt Securities Available-for-Sale	$ 500	$ 2,025