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Other Comprehensive Income - Summary of Tax Effects on Each Component of OCI (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Nov. 30, 2020
Aug. 31, 2020
Nov. 30, 2019
Aug. 31, 2019
Nov. 30, 2020
Nov. 30, 2019
Components Of Other Comprehensive Income Loss [Abstract]            
Foreign currency translation, before tax $ (1,027)   $ 6,662   $ 6,581 $ 11,444
Foreign currency translation, tax (24)       676  
Foreign currency translation, net of tax (1,051)   6,662   7,257 11,444
Pension liability adjustment, before tax (4)   117   484 1,421
Pension liability adjustment, tax     (22)   (116) (313)
Pension liability adjustment, net of tax (4)   95   368 1,108
Cash flow hedges, before tax 19,540   4,016   22,793 691
Cash flow hedges, tax (4,322)   (803)   (5,012) (117)
Cash flow hedges, net of tax 15,218   3,213   17,781 574
Other comprehensive income, before tax 18,509   10,795   29,858 13,556
Other comprehensive income, tax (4,346)   (825)   (4,452) (430)
Other comprehensive income $ 14,163 $ 11,242 $ 9,970 $ 3,156 $ 25,406 $ 13,126