Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 837,270	$ 267,427	$ 1,440,023	$ 536,058
Other comprehensive loss:
Unrealized holding gains on marketable securities, net	2,714	451	1,950	1,047
Unrealized losses on foreign currency forward contracts, net of tax of $4.7 million, $1.8 million, $(0.3) million and $3.3 million, respectively	(19,680)	(5,776)	(898)	(5,998)
Foreign currency translation adjustment	(10,538)	(3,876)	(13,200)	1,091
Total other comprehensive loss	(27,504)	(9,201)	(12,148)	(3,860)
Comprehensive income	$ 809,766	$ 258,226	$ 1,427,875	$ 532,198