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, 2020	Dec. 31, 2019
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Purchased OREO	$ 4,577	$ 5,248
Non Purchased OREO	3,576	2,762
Total OREO	8,153	8,010
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	754	890
Non Purchased OREO	1,116	415
Total OREO	1,870	1,305
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	1,605	2,106
Non Purchased OREO	798	1,548
Total OREO	2,403	3,654
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	345	530
Non Purchased OREO	1,324	369
Total OREO	1,669	899
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	1,873	1,722
Non Purchased OREO	338	430
Total OREO	$ 2,211	$ 2,152