Comprehensive Income (Loss) - Components of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2020	May 31, 2019	May 31, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		$ 948,394	$ 1,036,375	$ 1,073,929
Other comprehensive income (loss) before reclassifications		(4,965)	(30,693)
Reclassification adjustments to income	[1]	12,389	(2,389)
Income tax effect		823	4,198	(701)
Balance		966,433	948,394	1,036,375
Foreign Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		(19,639)	(4,987)
Other comprehensive income (loss) before reclassifications		10,480	(14,652)
Income tax effect		17
Balance		(9,142)	(19,639)	(4,987)
Pension Liability Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		(17,856)	(16,071)
Other comprehensive income (loss) before reclassifications		(5,948)	(3,404)
Reclassification adjustments to income	[1]	553	1,201
Income tax effect		1,365	418
Balance		(21,886)	(17,856)	(16,071)
Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		(5,969)	6,478
Other comprehensive income (loss) before reclassifications		(9,497)	(12,637)
Reclassification adjustments to income	[1]	11,836	(3,590)
Income tax effect		(559)	3,780
Balance		(4,189)	(5,969)	6,478
Accumulated Other Comprehensive Loss, Net of Tax
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		(43,464)	(14,580)	(27,775)
Other comprehensive income (loss) before reclassifications		(4,965)
Balance		$ (35,217)	$ (43,464)	$ (14,580)

[1] The statement of earnings classification of amounts reclassified to income for cash flow hedges is disclosed in “Note Q – Derivative Financial Instruments and Hedging Activities.”