Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 380,064	$ 292,316	$ (79,079)
Unrealized losses on marketable securities, net of taxes of $0, $0 and $0, respectively	0	(28)	0
Foreign currency translation adjustments	(338)	(1,906)	6,029
Other comprehensive income (loss)	(338)	(1,934)	6,029
Comprehensive income (loss)	$ 379,726	$ 290,382	$ (73,050)