Investment Securities - Amortized Cost and Fair Value of Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jan. 01, 2022	Dec. 31, 2021
Amortized Cost
Due in one year or less	$ 0
Due after one year through five years	80,050
Due after five years through ten years	119,910
Due after ten years	180,001
Total amortized cost	379,961
Mortgage-backed securities	341,805
Amortized cost	721,766		$ 946,511
Fair Value
Due in one year or less	0
Due after one year through five years	76,251
Due after five years through ten years	108,410
Due after ten years	158,944
Total fair value	343,605
Mortgage-backed securities	313,941
Fair value	657,546		$ 938,164
Amortized Cost
Due in one year or less	0
Due after one year through five years	6,701
Due after five years through ten years	45,685
Due after ten years	73,379
Total amortized cost	125,765
Mortgage-backed securities	178,249
Amortized cost	304,014
Fair Value
Due in one year or less	0
Due after one year through five years	6,432
Due after five years through ten years	41,464
Due after ten years	62,202
Total fair value	110,098
Mortgage-backed securities	159,853
Fair value	$ 269,951	$ 309,700