Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 43,168	$ 33,961
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(80)	(17,831)
Total comprehensive income	$ 43,088	$ 16,130