Goodwill and Other Long-Lived Assets - Summary of Other Intangible Assets by Class (Detail) - USD ($) $ in Thousands	May 31, 2019	May 31, 2018
Other Intangible Assets [Line Items]
Indefinite-lived intangibles assets, Cost	$ 74,801	$ 76,701
Definite-lived intangibles assets, Cost	209,017	212,247
Total intangible assets, Cost	283,818	288,948
Definite-lived intangible assets, Accumulated Amortization	87,759	74,922
Trademarks
Other Intangible Assets [Line Items]
Indefinite-lived intangibles assets, Cost	74,801	76,701
Customer relationships
Other Intangible Assets [Line Items]
Definite-lived intangibles assets, Cost	174,150	173,363
Definite-lived intangible assets, Accumulated Amortization	69,258	57,125
Non-compete agreements
Other Intangible Assets [Line Items]
Definite-lived intangibles assets, Cost	8,656	8,669
Definite-lived intangible assets, Accumulated Amortization	8,509	8,137
Technology / know-how
Other Intangible Assets [Line Items]
Definite-lived intangibles assets, Cost	22,495	26,411
Definite-lived intangible assets, Accumulated Amortization	6,276	5,856
Other
Other Intangible Assets [Line Items]
Definite-lived intangibles assets, Cost	3,716	3,804
Definite-lived intangible assets, Accumulated Amortization	$ 3,716	$ 3,804