Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 665,244	$ 402,835	$ 1,279,946	$ 1,077,308
Other comprehensive income (loss):
Foreign currency translation adjustments	(20,894)	(2,081)	(21,664)	6,049
Comprehensive income	$ 644,350	$ 400,754	$ 1,258,282	$ 1,083,357