Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Consolidated net (loss) income	$ (50,015)	$ 14,962	$ (44,717)	$ 24,348
Other comprehensive income (loss):
Unrealized loss on marketable securities, net of tax	(48)		(48)
Translation adjustments, net of tax	1,100	570	(2,709)	76
Other comprehensive income (loss)	1,052	570	(2,757)	76
Total consolidated comprehensive (loss) income	$ (48,963)	$ 15,532	$ (47,474)	$ 24,424