FDIC Indemnification Asset (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 23, 2016	Mar. 31, 2016	Dec. 31, 2015
Receivable from FDIC for Loss Share Agreements
Balance at beginning of period		$ 4,401
Decrease in expected losses on loans		(23)
Additional recoveries on OREO		(1,736)
Reimbursable expenses		71
Amortization of discounts and premiums, net		(1,475)
Payments to (from) FDIC		853
Termination of Loss Share Agreement		(2,091)
Payment to settle FDIC loss share agreements	$ 2,300
Amortization of FDIC indemnification assets, net		5,901
FDIC indemnification asset		$ 4,401		$ 2,100	$ 4,401
Covered loans			$ 87,400
Other Real Estate, Covered			$ 3,000		$ 5,751
Pre-tax charge	$ 4,400