CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - 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 (loss)	$ 31,099	$ (3,470)	$ 44,482	$ (12,336)
Other comprehensive income (loss):
Foreign currency translation adjustments	155	346	(173)	649
Comprehensive income (loss)	$ 31,254	$ (3,124)	$ 44,309	$ (11,687)