Securities - Amortized Cost and Fair Value of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Amortized Cost
Due in one year or less	$ 9,984
Due after one year through five years	149,091
Due after five years through ten years	49,085
Due after ten years	11,523
Available-for-Sale Debt Securities With Fixed Maturities	219,683
Total Debt Securities, Available-for-sale, Amortized Cost	1,104,105	$ 900,235
Fair Value
Due in one year or less	9,767
Due after one year through five years	138,134
Due after five years through ten years	44,838
Due after ten years	11,238
Available-for-Sale Debt Securities With Fixed Maturities	203,977
Total Available-for-Sale Debt Securities	1,001,784	909,651
Collateralized mortgage obligations of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	482,039
Total Debt Securities, Available-for-sale, Amortized Cost	482,039	270,696
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	428,407
Total Available-for-Sale Debt Securities	428,407	270,294
Residential mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	49,418
Total Debt Securities, Available-for-sale, Amortized Cost	49,418	57,029
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	41,587
Total Available-for-Sale Debt Securities	41,587	56,793
Commercial mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	352,465
Total Debt Securities, Available-for-sale, Amortized Cost	352,465	336,918
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	327,313
Total Available-for-Sale Debt Securities	327,313	341,300
Corporate Obligations
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	500
Total Debt Securities, Available-for-sale, Amortized Cost	500	500
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	500
Total Available-for-Sale Debt Securities	$ 500	$ 500