Acquisitions - Additional Information (Detail) $ in Thousands			12 Months Ended
	May. 23, 2014 USD ($)	Aug. 27, 2013 USD ($)	Aug. 31, 2015 USD ($)	Aug. 31, 2014 USD ($)	Aug. 31, 2013 USD ($)
Business Acquisition [Line Items]
Transaction costs related to business acquisition activities			$ 100	$ 500	$ 3,700
Reductions in goodwill due to purchase price			3,244	835
Cash paid for business acquisitions, net of cash acquired			$ 0	30,500	$ 235,489
Recognition of Goodwill due to Business acquired				$ 17,536
Number of businesses acquired			0	1	1
Viking
Business Acquisition [Line Items]
Business Acquisition, Date of Acquisition Agreement		Aug. 27, 2013
Cash paid for business acquisitions, net of cash acquired		$ 235,500
Recognition of Goodwill due to Business acquired		86,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		65,400
Hayes Industries
Business Acquisition [Line Items]
Business Acquisition, Date of Acquisition Agreement	May 23, 2014
Cash paid for business acquisitions, net of cash acquired	$ 30,500
Recognition of Goodwill due to Business acquired	14,292
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	10,550
Customer Relationships | Viking
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		40,500
Customer Relationships | Hayes Industries
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	3,300
Non-compete Agreements | Hayes Industries
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	250
Patents | Hayes Industries
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	5,000
Trade Names | Hayes Industries
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 2,000
Trade Names | Viking
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 24,900