Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Income Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ 4,251,296	$ 3,657,958
Other comprehensive loss	(27,146)	(33,851)
Ending Balance	4,321,363	3,672,218
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(20,201)	(45,144)
Ending Balance	(47,347)	$ (78,995)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(33,295)
Other comprehensive loss	(24,265)
Ending Balance	(57,560)
Net Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	13,094
Other comprehensive loss	(2,881)
Ending Balance	$ 10,213