FDIC Indemnification Asset (Details) - USD ($) $ in Thousands			12 Months Ended
	Jun. 23, 2016	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Receivable from FDIC for Loss Share Agreements
Balance at beginning of period			$ 4,401	$ 22,161
Decrease in expected losses on loans			(23)	(788)
Additional recoveries on OREO			(1,736)	(5,440)
Reimbursable expenses			71	789
Amortization of discounts and premiums, net			(1,475)	(8,587)
Payments to (from) FDIC			853	(3,734)
Termination of Loss Share Agreement			(2,091)
Balance at end of period				4,401
Pre- tax charge	$ 4,400
Payment to settle FDIC loss share agreements	2,300
Amortization of FDIC indemnification assets, net		$ 2,100	5,902	8,587
FDIC indemnification asset			$ 4,401	$ 22,161	$ 4,401	$ 22,161
Covered loans	$ 87,400
Other Real Estate, Covered					$ 5,751	$ 16,227