Securities - Contractual Maturities of Debt Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Amortized Cost
Due in one year or less	$ 18,402
Due after one year through five years	128,117
Due after five years through ten years	70,299
Due after ten years	11,571
Available-for-Sale Debt Securities With Maturities, Amortized Cost	228,389
Amortized Cost	1,100,999	$ 900,235
Fair Value
Due in one year or less	18,381
Due after one year through five years	118,811
Due after five years through ten years	62,733
Due after ten years	10,806
Available-for-Sale Debt Securities With Maturities, Fair Value	210,731
Total Available-for-Sale Debt Securities, Fair Value	996,403	909,651
Collateralized mortgage obligations of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	470,935
Amortized Cost	470,935	270,696
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	419,719
Total Available-for-Sale Debt Securities, Fair Value	419,719	270,294
Residential mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	50,625
Amortized Cost	50,625	57,029
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	41,984
Total Available-for-Sale Debt Securities, Fair Value	41,984	56,793
Commercial mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	350,550
Amortized Cost	350,550	336,918
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	323,469
Total Available-for-Sale Debt Securities, Fair Value	323,469	$ 341,300
Corporate obligations
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	500
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	$ 500