Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	May 31, 2016	Feb. 29, 2016	May 31, 2015	May 31, 2016	May 31, 2015	Aug. 31, 2015
Impaired Assets [Line Items]
Goodwill impairment charge		$ 118,122		$ 118,462	$ 77,992
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		16,653
Impairment of Intangible Assets, Finite-lived		27,952
Tangible Asset Impairment Charges		23,784
Impairment charges	$ 0	186,511	$ 0	186,511	84,353
Goodwill	529,421			529,421		$ 608,256
Future Amortization Expense, Remainder of 2016	5,600			5,600
Future Amortization Expense, 2017	21,300			21,300
Future Amortization Expense, 2018	21,000			21,000
Future Amortization Expense, 2019	20,700			20,700
Future Amortization Expense, 2020	19,900			19,900
Future Amortization Expense, 2021	18,800			18,800
Future Amortization Expense, Thereafter	$ 53,400			$ 53,400
Tradenames
Impaired Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)					$ 6,362
Viking
Impaired Assets [Line Items]
Goodwill impairment charge		39,099
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		13,289
Impairment of Intangible Assets, Finite-lived		27,952
Tangible Asset Impairment Charges		23,784
Impairment charges		104,124
Cortland
Impaired Assets [Line Items]
Goodwill impairment charge		34,502
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		2,211
Impairment of Intangible Assets, Finite-lived		0
Tangible Asset Impairment Charges		0
Impairment charges		36,713
maximatecc
Impaired Assets [Line Items]
Goodwill impairment charge		44,521
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		1,153
Impairment of Intangible Assets, Finite-lived		0
Tangible Asset Impairment Charges
Impairment charges		$ 45,674