Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 7,519,242	$ 5,069,965	$ 6,085,244	$ 4,435,203
Other comprehensive (loss) income before reclassifications			(32,711)	38,037
Amounts reclassified from accumulated other comprehensive income (loss)			(6,298)	(19,849)
Total other comprehensive (loss) income	(26,861)	22,048	(39,009)	18,188
Ending balance	8,133,473	5,253,394	8,133,473	5,253,394
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			(895)	(11,227)
Other comprehensive (loss) income before reclassifications			(12,616)	10,263
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Total other comprehensive (loss) income			(12,616)	10,263
Ending balance	(13,511)	(964)	(13,511)	(964)
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			818	1,111
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Total other comprehensive (loss) income			818	1,111
Ending balance	1,321	575	1,321	575
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			(20,913)	26,663
Amounts reclassified from accumulated other comprehensive income (loss)			(6,298)	(19,849)
Total other comprehensive (loss) income			(27,211)	6,814
Ending balance	(28,792)	19,236	(28,792)	19,236
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(14,121)	(3,201)	(1,973)	659
Total other comprehensive (loss) income	(26,861)	22,048	(39,009)	18,188
Ending balance	$ (40,982)	$ 18,847	$ (40,982)	$ 18,847