Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2013
NET LOSS	$ (60,725)	$ (182,257)	$ (39,142)
OTHER COMPREHENSIVE (LOSS) INCOME, net of tax:
Foreign currency translation adjustment	(26,712)	4,315	1,644
Changes in fair value of cash flow hedges:
Portion of cash flow hedges recognized in other comprehensive income	672	(313)	(535)
Less: reclassification adjustment for losses included in net income	(257)	653	712
Net changes in fair value of cash flow hedges	415	340	177
OTHER COMPREHENSIVE (LOSS) INCOME	(26,297)	4,655	1,821
COMPREHENSIVE LOSS	$ (87,022)	$ (177,602)	$ (37,321)