Loans - Acquired Loans (Details 5) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Credit impaired acquired loans:
Outstanding principal balance	$ 11,033		$ 16,224
Recorded investment	9,405		14,154
Discount, net	1,628		2,070
Other acquired loans:
Outstanding principal balance	164,228		226,284
Recorded investment	163,240		224,270
Discount, net	952		2,011
Total acquired loans:
Outstanding principal balance	175,261		242,508
Deferred fees, net	(36)		(3)
Recorded investment	172,645		238,424
Discount, net	2,580		$ 4,081
Changes in the accretable yield for credit impaired acquired loans
Beginning balance	685	$ 603
Reclassifications from nonaccretable yield	557	91
Accretion	(196)	(110)
Balance at period end	$ 1,046	$ 584