Share-based Compensation - Stock Options (Details) - USD ($)		12 Months Ended
		Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Granted		0	0	0
Aggregate Intrinsic Value of Stock Options Exercised		$ 0
Options Vested		0	307,855	0
Tax Benefit Realized from Exercise of Stock Options		$ 0
Options, Outstanding [Roll Forward]
Outstanding, Beginning Balance		526,000	555,000	612,000
Granted		0	0	0
Exercised		0	(9,000)	(15,000)
Canceled		(122,000)	(20,000)	(42,000)
Outstanding, Ending Balance		404,000	526,000	555,000	612,000
Weighted Average Exercise Price
Weighted Average Exercise Price, Beginning Balance		$ 32.25	$ 32.07	$ 31.94
Weighted Average Grant Date Fair Value		0.00	0.00	0.00
Exercises, Weighted Average Exercise Price		0.00	25.56	20.48
Canceled, Weighted Average Exercise Price		24.95	30.55	34.39
Weighted Average Exercise Price, Ending Balance		$ 34.46	$ 32.25	$ 32.07	$ 31.94
Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term (in years)		1 year 3 months	2 years 2 months	3 years 1 month	3 years 11 months
Aggregate Intrinsic Value (in thousands)
Aggregate Intrinsic Value	[1]	$ 0	$ 335,000	$ 47,000	$ 459,000

[1] Amounts represent the difference between the exercise price and the closing price of the Company’s stock on the last trading day of the corresponding fiscal year, multiplied by the number of in-the-money options.