Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Partners Capital [Abstract]
Net income (loss)	$ (122,206)	$ 230,083	$ (376,431)	$ 45,425
Other comprehensive income (loss):
Change in foreign currency translation adjustment	31,681	(30,666)	19,047	(34,304)
Net change in unrealized gains (losses) on available-for-sale marketable debt securities, net of tax	(353)	82	10	133
Other comprehensive income (loss), net of tax	31,328	(30,584)	19,057	(34,171)
Comprehensive income (loss)	$ (90,878)	$ 199,499	$ (357,374)	$ 11,254