Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Net earnings	$ 134,940	$ 208,115	$ 173,546
Foreign currency translation adjustments, net of tax of $(259), $(193), and $158 for 2021, 2020, and 2019, respectively	(975)	(726)	595
Total other comprehensive (loss) income	(975)	(726)	595
Comprehensive income	133,965	207,389	174,141
Foreign currency translation tax adjustment	$ (259)	$ (193)	$ 158