CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 11,429	$ 15,346	$ 20,005	$ 35,520
Foreign exchange translation adjustments	0	4	(57)	3
Cash-flow hedges	(73)	(429)	(1,909)	(621)
Other comprehensive income (loss), net of tax	(73)	(425)	(1,966)	(618)
Comprehensive income	$ 11,356	$ 14,921	$ 18,039	$ 34,902