Other Real Estate Owned - Covered and Not Covered Under a Loss-Share Agreement, Net of Valuation Allowances and Direct Write-Downs (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Purchased OREO	$ 2,453	$ 3,927
Non Purchased OREO	2,252	2,045
Total OREO	4,705	5,972
Residential real estate
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Purchased OREO	127	72
Non Purchased OREO	376	107
Total OREO	503	179
Commercial real estate
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Purchased OREO	858	1,741
Non Purchased OREO	1,813	924
Total OREO	2,671	2,665
Residential land development
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Purchased OREO	311	337
Non Purchased OREO	4	676
Total OREO	315	1,013
Commercial land development
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Purchased OREO	1,157	1,777
Non Purchased OREO	59	338
Total OREO	$ 1,216	$ 2,115