Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 97,047	$ 107,332
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of tax of $5,187 and $10,560 for the three months ended March 31, 2016 and 2015	9,580	(19,605)
Other comprehensive income (loss)	9,580	(19,605)
Comprehensive income	106,627	87,727
Less comprehensive income attributable to the noncontrolling interest	577	297
Comprehensive income attributable to shareholders	$ 106,050	$ 87,430