Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Components of comprehensive income
Net income	$ 11,093	$ 7,031	$ 6,101	$ 5,544	$ 18,124	$ 11,645
Mark to market of foreign exchange hedges			9			1
Deferred income tax expense			(2)
Comprehensive income	$ 11,093	$ 7,031	$ 6,108	$ 5,538	$ 18,124	$ 11,646