Gross Carrying Value and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2016	Aug. 31, 2015
Indefinite And Finite Lived Intangible Assets [Line Items]
Finite-Lived Accumulated Amortization	$ 202,311	$ 165,486
Intangible assets, gross	441,786	474,248
Intangible assets, net	239,475	308,762
Trade Names
Indefinite And Finite Lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets, Gross	90,909	112,437
Customer Relationships
Indefinite And Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	292,671	302,518
Finite-Lived Accumulated Amortization	166,252	132,007
Net Book Value	$ 126,419	170,511
Weighted Average Amortization Period	14 years
Patents
Indefinite And Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 30,296	30,899
Finite-Lived Accumulated Amortization	22,233	19,928
Net Book Value	$ 8,063	10,971
Weighted Average Amortization Period	10 years
Trademarks and Tradenames
Indefinite And Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 21,283	21,604
Finite-Lived Accumulated Amortization	7,936	7,055
Net Book Value	$ 13,347	14,549
Weighted Average Amortization Period	18 years
Non-Compete Agreements and Other
Indefinite And Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 6,627	6,790
Finite-Lived Accumulated Amortization	5,890	6,496
Net Book Value	$ 737	294
Weighted Average Amortization Period	3 years
Indefinite-Lived Intangible Assets, Gross	$ 0	$ 0