Allowance for Credit Losses - Unfunded Loan Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Allowance for loan losses:
Beginning balance	$ 20,535	$ 946
Provision for credit losses on unfunded loan commitments (included in other noninterest expense)	(500)	9,200
Ending balance	20,035	$ 20,535
Accounting Standards Update [Extensible List]		Accounting Standards Update 2016-13 [Member]
Cumulative Effect, Period of Adoption, Adjustment
Allowance for loan losses:
Beginning balance		$ 10,389
Ending balance	$ 0