FDIC Indemnification Asset (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Receivable from FDIC for Loss Share Agreements
Balance at the beginning of period		$ 4,401	$ 22,161
Decrease in expected losses on loans		(23)	(21)
Additional recoveries on OREO		(1,736)	(4,164)
Reimbursable expenses		71	701
Amortization of discounts and premiums, net		(1,475)	(7,120)
Payments to FDIC		853	(3,615)
Termination of Loss Share Agreement		(2,091)
Balance at the end of period			7,942
Pre-tax charge	$ 4,400
Payment to settle FDIC loss share agreements	2,300	2,342
FDIC indemnification asset		4,401	$ 22,161	$ 2,100	$ 4,401	$ 7,942	$ 22,161
Covered Other real estate under share agreements	22,211	22,211			$ 30,554	$ 31,378	$ 42,726
OREO
Receivable from FDIC for Loss Share Agreements
Non-covered loans	87,400	87,400
Covered Other real estate under share agreements	$ 3,000	$ 3,000