Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 122,782	$ 140,111
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments, net of tax expense of $1,174 and $521 for the three months ended March 31, 2020 and 2019	(38,849)	1,365
Other comprehensive (loss) income	(38,849)	1,365
Comprehensive income	83,933	141,476
Less comprehensive income attributable to the noncontrolling interest	148	282
Comprehensive income attributable to shareholders	$ 83,785	$ 141,194