Goodwill and Intangible Assets, Goodwill) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Goodwill and Intangible Assets [Abstract]
Balance at beginning of period	$ 269,383
Purchase accounting adjustments	195
Effect of foreign currency translation adjustments	(8)
Balance at end of period	$ 269,570