Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Income Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ 3,657,958	$ 3,191,860
Other comprehensive loss	(33,851)	1,933
Ending Balance	3,672,218	3,283,217
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(45,144)	(48,912)
Ending Balance	(78,995)	$ (46,979)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(52,924)
Other comprehensive loss	(26,277)
Ending Balance	(79,201)
Net Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	7,780
Other comprehensive loss	(7,574)
Ending Balance	$ 206