Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Income Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance as of January 1, 2014			$ (2,091)
Other comprehensive (loss) income	(12,042)	5,521	(7,454)	(3,794)
Balance as of September 30, 2014	(9,545)		(9,545)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance as of January 1, 2014			(6,715)
Other comprehensive (loss) income			(7,937)
Balance as of September 30, 2014	(14,652)		(14,652)
Net Unrealized Gain on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance as of January 1, 2014			4,624
Other comprehensive (loss) income			483
Balance as of September 30, 2014	$ 5,107		$ 5,107