Stock-Based Compensation (Stock Option and SARs Activity) (Details 2) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	12 Months Ended
		Nov. 30, 2016	Aug. 31, 2016
Stock-Based Compensation [Abstract]
Shares Available for Grant, Beginning Balance		4,898,739
Shares Available for Grant, SARS canceled		1,331,769
Shares Available for Grant, Restricted stock awards granted, net of forfeitures	[1]	1,231,137
Shares Available for Grant, Ending Balance		7,461,645	4,898,739
SARS Outstanding, beginning balance		2,439,066
SARS Outstanding, SARS canceled		(1,331,769)
SARS Outstanding, SARS exercised		(28,818)
SARS Outstanding, ending balance		1,078,479	2,439,066
SARS Outstanding, exercisable ending balance		1,078,479
Aggregate Intrinsic Value, beginning balance		$ 1,066
Aggregate Intrinsic Value, ending balance		1,052	$ 1,066
Aggregate Intrinsic Value, Exercisable ending balance		$ 1,052
Weighted-Average Exercise Price, beginning balance		$ 25.32
Weighted-Average Exercise Price, SARS canceled		29.27
Weighted-Average Exercise Price, SARS exercised		22.52
Weighted-Average Exercise Price, ending balance		20.55	$ 25.32
Weighted-Average Exercise Price, exercisable ending balance		$ 20.55
Weighted-Average Remaining Contractual Life		2 years 1 month 29 days	1 year 1 month 17 days
Weighted-Average Remaining Contractual Life, Exercisable ending balance		2 years 1 month 29 days

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