Derivatives (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Swap fee income	$ 2,483	$ 2,533	$ 1,847
Collateral posted against derivative liabilities	$ 5,000	$ 8,600