CONDENSED 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	$ 6,915	$ 4,910	$ 39,329	$ 15,202
Change in cumulative foreign currency translation adjustment	(2,696)	(236)	(1,577)	(2,987)
Total comprehensive income	$ 4,219	$ 4,674	$ 37,752	$ 12,215