Goodwill and Other Long-Lived Assets - Summary of Other Intangible Assets by Class (Detail) - USD ($) $ in Thousands	May 31, 2020	May 31, 2019
Other Intangible Assets [Line Items]
Indefinite-lived intangibles assets, Cost	$ 72,101	$ 74,801
Definite-lived intangibles assets, Cost	205,088	209,017
Total intangible assets, Cost	277,189	283,818
Definite-lived intangible assets, Accumulated Amortization	92,774	87,759
Trademarks
Other Intangible Assets [Line Items]
Indefinite-lived intangibles assets, Cost	72,101	74,801
Customer relationships
Other Intangible Assets [Line Items]
Definite-lived intangibles assets, Cost	170,887	174,150
Definite-lived intangible assets, Accumulated Amortization	73,207	69,258
Non-compete agreements
Other Intangible Assets [Line Items]
Definite-lived intangibles assets, Cost	8,001	8,656
Definite-lived intangible assets, Accumulated Amortization	8,001	8,509
Technology / know-how
Other Intangible Assets [Line Items]
Definite-lived intangibles assets, Cost	22,484	22,495
Definite-lived intangible assets, Accumulated Amortization	7,850	6,276
Other
Other Intangible Assets [Line Items]
Definite-lived intangibles assets, Cost	3,716	3,716
Definite-lived intangible assets, Accumulated Amortization	$ 3,716	$ 3,716