Other Comprehensive Income (Loss) - Summary of Tax Effects on Each Component of OCI (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Nov. 30, 2019	Aug. 31, 2019	Nov. 30, 2018	Aug. 31, 2018	Nov. 30, 2019	Nov. 30, 2018
Components Of Other Comprehensive Income Loss [Abstract]
Foreign currency translation, before tax	$ 6,662		$ (6,638)		$ 11,444	$ (10,333)
Foreign currency translation, net of tax	6,662		(6,638)		11,444	(10,333)
Pension liability adjustment, before tax	117				1,421
Pension liability adjustment, tax	(22)				(313)	(97)
Pension liability adjustment, net of tax	95				1,108	(97)
Cash flow hedges, before tax	4,016		(6,066)		691	(8,593)
Cash flow hedges, tax	(803)		1,404		(117)	1,961
Cash flow hedges, net of tax	3,213		(4,662)		574	(6,632)
Other comprehensive loss, before tax	10,795		(12,704)		13,556	(18,926)
Other comprehensive loss, tax	(825)		1,404		(430)	1,864
Other comprehensive income (loss)	$ 9,970	$ 3,156	$ (11,300)	$ (5,762)	$ 13,126	$ (17,062)

Amount before tax, after reclassification adjustments of other comprehensive income (loss).

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