Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2019	Aug. 31, 2018
Indefinite And Finite Lived Intangible Assets [Line Items]
Accumulated Amortization	$ 183,968	$ 193,941
Gross Carrying Value	342,150	374,978
Net Book Value	158,182	181,037
Tradenames
Indefinite And Finite Lived Intangible Assets [Line Items]
Accumulated Amortization	0	0
Net Book Value	86,689	87,253
Gross Carrying Value	$ 86,689	87,253
Customer relationships
Indefinite And Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	15 years
Gross Carrying Value	$ 217,539	230,601
Accumulated Amortization	149,742	147,451
Net Book Value	$ 67,797	83,150
Patents
Indefinite And Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	11 years
Gross Carrying Value	$ 25,097	30,355
Accumulated Amortization	23,371	25,327
Net Book Value	$ 1,726	5,028
Trademarks and tradenames
Indefinite And Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	14 years
Gross Carrying Value	$ 7,254	20,823
Accumulated Amortization	5,284	15,347
Net Book Value	$ 1,970	5,476
Other intangibles
Indefinite And Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (Years)	3 years
Gross Carrying Value	$ 5,571	5,946
Accumulated Amortization	5,571	5,816
Net Book Value	$ 0	$ 130