Other Real Estate Owned (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Real Estate Properties [Line Items]
Mortgage Loans in Process of Foreclosure, Amount	$ 28,800		$ 21,782
Covered
Beginning balance	472	$ 6,817
Additions	16	4,734
Sales	(273)	(781)
Write-downs	(53)	(570)
Other Real Estate Covered Transfers		(9,716)
Ending balance	162	484
Noncovered
Beginning balance	60,759	58,742
Additions	21,875	16,546
Sales	(19,115)	(14,728)
Write-downs	(2,955)	(3,815)
Other Real Estate Non Covered Transfers		9,716
Ending balance	60,619	66,605
Total
Beginning balance	61,231	65,559
Additions	21,891	21,280
Sales	(19,388)	(15,509)
Write-downs	(3,008)	(4,385)
Other Real Estate Transfers		0
Ending balance	60,781	67,089
Mortgage
Total
Beginning balance	15,000
Ending balance	20,600
First CornerStone Bank
Covered
Additions		0
Noncovered
Additions		144
Total
Additions		$ 144
Guaranty Bank
Covered
Additions	0
Noncovered
Additions	55
Total
Additions	$ 55