Securities - Contractual Maturities of Debt Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Amortized Cost
Due in one year or less	$ 35,648
Due after one year through five years	117,273
Due after five years through ten years	104,696
Due after ten years	11,619
Available-for-Sale Debt Securities With Maturities, Amortized Cost	269,236
Amortized Cost	1,129,346	$ 900,235
Fair Value
Due in one year or less	35,760
Due after one year through five years	113,923
Due after five years through ten years	97,991
Due after ten years	11,273
Available-for-Sale Debt Securities With Maturities, Fair Value	258,947
Total Available-for-Sale Debt Securities, Fair Value	1,067,492	909,651
Collateralized mortgage obligations of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	456,889
Amortized Cost	456,889	270,696
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	427,635
Total Available-for-Sale Debt Securities, Fair Value	427,635	270,294
Residential mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	52,289
Amortized Cost	52,289	57,029
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	46,416
Total Available-for-Sale Debt Securities, Fair Value	46,416	56,793
Commercial mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	350,432
Amortized Cost	350,432	336,918
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	333,994
Total Available-for-Sale Debt Securities, Fair Value	333,994	$ 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