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	Mar. 31, 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	$ 5,430	$ 5,248
Non Purchased OREO	3,241	2,762
Total OREO	8,671	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	649	890
Non Purchased OREO	1,012	415
Total OREO	1,661	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	2,058	2,106
Non Purchased OREO	1,353	1,548
Total OREO	3,411	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	572	530
Non Purchased OREO	387	369
Total OREO	959	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	2,151	1,722
Non Purchased OREO	489	430
Total OREO	$ 2,640	$ 2,152