Premises and Equipment Narrative Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Depreciation	$ 1,255	$ 1,080	$ 976
Rent expense	144	138	123
Rental income	$ 220	$ 227	$ 224