Goodwill and Intangible Assets (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill at beginning of period	$ 154,281	$ 154,443
Increases recorded in business combinations	249,973
Changes resulting from foreign currency fluctuations	53	(170)
Goodwill at end of period	$ 404,307	$ 154,273