Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Real Estate Acquired Through Foreclosure [Roll Forward]
Beginning balance	$ 11,286	$ 7,908	$ 10,019	$ 6,254
OREO acquired through acquisition	0	1,120	1,192	1,120
Additions	1,419	1,316	3,182	5,335
Valuation adjustments	(238)	0	(294)	(603)
Dispositions	(2,123)	(897)	(3,755)	(2,659)
Ending balance	10,344	$ 9,447	10,344	$ 9,447
Consumer mortgage loans collateralized by residential real estate property in the process of foreclosure	481		481		$ 0
Residential real estate
Real Estate Acquired Through Foreclosure [Roll Forward]
Beginning balance			2,282
Ending balance	$ 1,083		$ 1,083