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	Jun. 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	$ 5,258	$ 6,187
Non Purchased OREO	3,475	4,853
Total OREO	8,733	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	3,848	423
Non Purchased OREO	1,331	1,910
Total OREO	5,179	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	659	2,686
Non Purchased OREO	945	1,611
Total OREO	1,604	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	168	678
Non Purchased OREO	855	421
Total OREO	1,023	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	583	2,400
Non Purchased OREO	344	911
Total OREO	$ 927	$ 3,311