Investment Securities - Amortized Cost and Fair Value of Investment Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 01, 2022	Dec. 31, 2021
Amortized Cost
Due in one year or less	$ 1,020
Due after one year through five years	13,612
Due after five years through ten years	88,747
Due after ten years	111,841
Total amortized cost	215,220
Mortgage-backed securities	282,269
Amortized cost	497,489		$ 946,511
Fair Value
Due in one year or less	1,011
Due after one year through five years	12,701
Due after five years through ten years	77,200
Due after ten years	95,763
Total fair value	186,675
Mortgage-backed securities	253,041
Fair value	439,716		938,164
Amortized Cost
Due in one year or less	0
Due after one year through five years	62,300
Due after five years through ten years	87,245
Due after ten years	94,078
Total amortized cost	243,623
Mortgage-backed securities	224,683
Amortized Cost	468,306		$ 0
Fair Value
Due in one year or less	0
Due after one year through five years	59,996
Due after five years through ten years	77,143
Due after ten years	79,141
Total fair value	216,280
Mortgage-backed securities	194,738
Fair value	$ 411,018	$ 477,000