Securities - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity - Securities Held-to-maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Held-to-maturity, Amortized Cost
Due three months or less	$ 9,808
Due after three months through one year	5,020
Due after one year through five years	4,029
Due after five years through ten years	15,907
Agency mortgage-backed securities	663,481
Total	698,245
Held-to-maturity, Estimated Fair Value
Due three months or less	9,813
Due after three months through one year	5,022
Due after one year through five years	3,981
Due after five years through ten years	15,651
Agency mortgage-backed securities	573,519
Total	$ 607,986	$ 614,452