Consolidated Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 32,909	$ 11,873
Other comprehensive loss:
Foreign currency translation adjustments	(13,152)	(8,740)
Unrealized loss on foreign currency derivative securities, net of tax	(522)	(3,750)
Other comprehensive loss, net of tax	(13,674)	(12,490)
Comprehensive income (loss)	$ 19,235	$ (617)