CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 17,244	$ 6,372	$ 32,414	$ 10,292
Change in cumulative foreign currency translation adjustment	1,538	(4,356)	1,119	(2,751)
Total comprehensive income	$ 18,782	$ 2,016	$ 33,533	$ 7,541