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, 2019	Dec. 31, 2018
Other real estate owned ("OREO") covered and not covered under a loss-share agreement, net of valuation allowances and direct write-downs
Purchased OREO	$ 6,216	$ 6,187
Non Purchased OREO	1,975	4,853
Total OREO	8,191	11,040
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	907	423
Non Purchased OREO	97	1,910
Total OREO	1,004	2,333
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	3,049	2,686
Non Purchased OREO	908	1,611
Total OREO	3,957	4,297
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	530	678
Non Purchased OREO	369	421
Total OREO	899	1,099
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	1,730	2,400
Non Purchased OREO	601	911
Total OREO	$ 2,331	$ 3,311