Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 287,950	$ 122,782
Other comprehensive loss, net of tax:
Foreign currency translation adjustments, net of tax (benefit) expense of $(3,393) and $1,174 for the three months ended March 31, 2021 and 2020	(16,197)	(38,849)
Other comprehensive loss	(16,197)	(38,849)
Comprehensive income	271,753	83,933
Less comprehensive income attributable to the noncontrolling interest	266	148
Comprehensive income attributable to shareholders	$ 271,487	$ 83,785