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	$ 16,181	$ 10,822	$ 42,295	$ 41,704
Other comprehensive income (loss)
Changes in cumulative translation adjustment, net of tax	(544)	(61)	(698)	(55)
Net unrealized gains on derivative instruments	868	0	1,322	0
Reclassification of net realized gains on derivative instruments included in net income	(230)	0	(342)	0
Total change in unrealized gains (losses) realized from cash flow hedges, net of tax	638	0	980	0
Comprehensive income	$ 16,275	$ 10,761	$ 42,577	$ 41,649