Investment Securities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Schedule of Investments [Line Items]
AFS accrued interest	$ 1,000
HTM, at amortized cost (fair value $352,454 and $348,505)	396,784		$ 399,494
HTM accrued interest	2,200
Available-for-sale securities pledged as collateral	376,200		338,800
Net gains	0	$ 0
FHLB
Schedule of Investments [Line Items]
Letter of credit outstanding, amount	$ 183,500		$ 189,000