FDIC Indemnification Asset (Details) - USD ($) $ in Thousands		9 Months Ended
	Apr. 15, 2011	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
FDIC Indemnification Asset [Abstract]
FDIC loss-share agreement covered loans and other real estate losses	80.00%
FDIC true-up provisions		$ 2,500		$ 2,100
Reduction of FDIC indemnification asset included in other noninterest income - Covered Loans		1,200	$ 507
Balance at beginning of period		6,997	14,347
Amortization		(1,667)	(1,633)
Transfers to FDIC claims		(1,954)	(4,021)
Change in expected cash flows		(1,217)	(373)
Change in FDIC true up-provision		(410)	(166)
Balance at end of period		$ 1,749	$ 8,154