Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 1,418,845	$ 698,214	$ 592,016
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of tax (benefit) expense of ($5,275) in 2021, $4,254 in 2020, and $25,731 in 2019	(32,408)	30,759	(26,553)
Reclassification adjustment for foreign currency realized losses, net of tax of $145 in 2019			535
Other comprehensive (loss) income	(32,408)	30,759	(26,018)
Comprehensive income	1,386,437	728,973	565,998
Less comprehensive income attributable to the noncontrolling interest	1,606	1,399	1,309
Comprehensive income attributable to shareholders	$ 1,384,831	$ 727,574	$ 564,689