Summary of Tax Effects of Each Component of Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Before-Tax
Foreign currency translation, before tax	$ 8,646	$ (14,873)	$ 1,255	$ (31,735)
Pension liability adjustment, before tax	(90)	(1,072)	(98)	(1,072)
Cash flow hedges, before tax	8,505	(15,253)	5,938	(16,683)
Other comprehensive income (loss), before tax	17,061	(31,198)	7,095	(49,490)
Tax
Foreign currency translation, tax	0	0	0	0
Pension liability adjustment, tax		371		371
Cash flow hedges, tax	(3,075)	5,715	(2,401)	6,225
Other comprehensive income (loss), tax	(3,075)	6,086	(2,401)	6,596
Net-of-tax
Foreign currency translation, net-of-tax	8,646	(14,873)	1,255	(31,735)
Pension liability adjustment, net-of-tax	(90)	(701)	(98)	(701)
Cash flow hedges, net-of-tax	5,430	(9,538)	3,537	(10,458)
Other comprehensive income (loss), net-of-tax	$ 13,986	$ (25,112)	$ 4,694	$ (42,894)