Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 6,085,244	$ 4,435,203
Other comprehensive (loss) income before reclassifications	22,346	10,689
Amounts reclassified from accumulated other comprehensive income (loss)	(6,990)	(5,348)
Total changes in other comprehensive income	15,356	5,341
Ending Balance	6,461,654	4,723,313
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(895)	(11,227)
Other comprehensive (loss) income before reclassifications	(2,662)	4,967
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Total changes in other comprehensive income	(2,662)	4,967
Ending Balance	(3,557)	(6,260)
On Available-For-Sale Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	503	(536)
Other comprehensive (loss) income before reclassifications	(764)	596
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Total changes in other comprehensive income	(764)	596
Ending Balance	(261)	60
On Foreign Currency Forward Contracts
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,581)	12,422
Other comprehensive (loss) income before reclassifications	25,772	5,126
Amounts reclassified from accumulated other comprehensive income (loss)	(6,990)	(5,348)
Total changes in other comprehensive income	18,782	(222)
Ending Balance	17,201	12,200
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,973)	659
Total changes in other comprehensive income	15,356	5,341
Ending Balance	$ 13,383	$ 6,000