Goodwill (Details)	6 Months Ended
	Jun. 30, 2015 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Balance as of December 31, 2014	$ 199,488,000
Foreign currency translation adjustments	(775,000)
Balance as of June 30, 2015	198,713,000
Goodwill impairment	$ 0