Allowance for Credit Losses - Unfunded Loan Commitments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Allowance for loan losses:
Beginning balance	$ 19,935	$ 20,535	$ 20,035	$ 20,535
Provision for (recovery of provision for) credit losses on unfunded loan commitments (included in other noninterest expense)	0	(200)	(100)	(200)
Ending balance	$ 19,935	$ 20,335	$ 19,935	$ 20,335