Other Comprehensive Income - Summary of Tax Effects on Each Component of OCI (Detail) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Components Of Other Comprehensive Income Loss [Abstract]
Foreign currency translation, before tax	$ 7,608	$ 4,782
Foreign currency translation, tax	700
Foreign currency translation, net of tax	8,308	4,782
Pension liability adjustment, before tax	488	1,304
Pension liability adjustment, tax	(116)	(291)
Pension liability adjustment, net of tax	372	1,013
Cash flow hedges, before tax	3,253	(3,325)
Cash flow hedges, tax	(691)	686
Cash flow hedges, net of tax	2,562	(2,639)
Other comprehensive income, before tax	11,349	2,761
Other comprehensive income, tax	(107)	395
Other comprehensive income	$ 11,242	$ 3,156