OREO (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Mortgage Loans in Process of Foreclosure, Amount	$ 0
Real Estate Acquired Through Foreclosure [Roll Forward]
Beginning balance	10,019	$ 6,254
Additions	368	3,227
Valuation adjustments	(47)	(17)
Dispositions	(912)	(207)
Ending balance	9,428	$ 9,257
Residential real estate
Real Estate Acquired Through Foreclosure [Roll Forward]
Beginning balance	2,282
Ending balance	$ 2,538