Goodwill and Other Intangibles (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 64,059
Impairment	(150)	$ 0	$ 0
Goodwill, Ending Balance	63,909	64,059
Commercial Banking [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	22,591
Impairment	0
Goodwill, Ending Balance	22,591	22,591
Wealth Management Services [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	41,468
Impairment	(150)
Goodwill, Ending Balance	$ 41,318	$ 41,468