Goodwill and Other Intangible Assets Narrative Data (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	May 27, 2011
Finite-Lived Intangible Assets [Line Items]
Goodwill at Acquisition					$ 2,200
Core Deposit Intangible at Acquisition					$ 1,700
Amortization of core deposit intangible	$ 43	$ 43	$ 129	$ 129