Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)
Goodwill and Other Intangible Assets [Abstract]
Payments to Acquire Businesses, Gross	$ 6,100
Goodwill [Roll Forward]
Beginning balance	256,232
Goodwill, Acquired During Period	5,369
Reduction in goodwill resulting from a business acquisition purchase price allocation adjustment	(525)
Foreign currency translation	(72)
Ending balance	$ 261,004