FDIC Indemnification Asset (Details) (USD $)	0 Months Ended	3 Months Ended
	Apr. 15, 2011	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
FDIC Indemnification Asset [Abstract]
FDIC loss-share agreement covered loans and other real estate losses (in hundredths)	80.00%
FDIC True-up provisions		$ 2,200,000		$ 2,100,000
Reduction of FDIC indemnification asset included in other noninterest income - Covered Loans		285,000	356,000
Reduction of FDIC indemnification asset included in noninterest income - Covered Other Real Estate		256,000
Balance at beginning of period		6,997,000	14,347,000
Amortization		(430,000)	(332,000)
Transfers to FDIC claims		(1,283,000)	(139,000)
Change in expected cash flows		(391,000)	(239,000)
Change in FDIC true up-provision		(150,000)	(150,000)
Balance at end of period		$ 4,743,000	$ 13,487,000