Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible assets	$ 38,400
Amortizing the core deposit intangibles (in years)	7 years
Intangible asset amortization	$ 5,500	$ 5,400	$ 5,300
Finite-Lived Intangible Assets, Accumulated Amortization	31,500	25,800
Goodwill	59,630	59,630	59,600
Goodwill Impairment	$ 0	$ 0	$ 0