Summary of Stock Option and Stock Appreciation Right Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Nov. 30, 2014		Aug. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Shares Available for Grant, Beginning Balance	10,823,646
Shares Available for Grant, Options granted	(435,000)
Shares Available for Grant, Options canceled	1,616,100
Shares Available for Grant, Restricted stock awards granted	(3,954,910)	[1]
Shares Available for Grant, Ending Balance	8,049,836		10,823,646
Options Outstanding, beginning balance	5,432,002
Options Outstanding, options granted	435,000
Options Outstanding, options canceled	(1,616,100)
Options Outstanding, options exercised	(2,947)
Options Outstanding, ending balance	4,247,955		5,432,002
Options Outstanding, exercisable ending balance	4,247,955
Aggregate Intrinsic Value, beginning balance	$ 400
Aggregate Intrinsic Value, ending balance	1,305		400
Aggregate Intrinsic Value, Exercisable ending balance	$ 1,305
Weighted-Average Exercise Price, beginning balance	$ 26.32
Weighted-Average Exercise Price, options granted	$ 18.49
Weighted-Average Exercise Price, options canceled	$ 24.16
Weighted-Average Exercise Price, options exercised	$ 10.82
Weighted-Average Exercise Price, ending balance	$ 26.35		$ 26.32
Weighted-Average Exercise Price, exercisable ending balance	$ 26.35
Weighted-Average Remaining Contractual Life	2 years 3 months 26 days		1 year 6 months 7 days
Weighted-Average Remaining Contractual Life, Exercisable ending balance	2 years 3 months 26 days

[1] Represents the maximum number of shares that can be issued based on the achievement of certain performance criteria.