Loans and Allowance for Credit Losses - Provision for Credit Losses (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Receivables [Abstract]
Loans	$ (19,890,000)	$ 22,313,000	$ (29,901,000)	$ 75,190,000
Unfunded commitments	0	0	0	(8,000,000)
Securities - HTM	0	66,000	(1,183,000)	4,000
Securities - AFS	0	602,000	(312,000)	836,000
Total	$ (19,890,000)	$ 22,981,000	$ (31,396,000)	$ 68,030,000