Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2018	Nov. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 37,792	$ 41,622	$ 94,750	$ 89,696
Other comprehensive income (loss):
Foreign currency translation	(6,638)	1,511	(10,333)	17,383
Pension liability adjustment, net of tax			(97)	(6)
Cash flow hedges, net of tax	(4,662)	(2,210)	(6,632)	(323)
Other comprehensive income (loss)	(11,300)	(699)	(17,062)	17,054
Comprehensive income	26,492	40,923	77,688	106,750
Comprehensive income attributable to noncontrolling interests	3,735	2,139	5,734	5,118
Comprehensive income attributable to controlling interest	$ 22,757	$ 38,784	$ 71,954	$ 101,632