Commitments And Contingencies (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 30, 2014	Nov. 30, 2015	Aug. 31, 2012	Aug. 31, 2015
Commitments And Contingencies [Abstract]
Environmental remediation expense		$ 0	$ 7,200
Environmental remediation, incremental costs	$ 1,500
Other current liabilities	1,403	1,343		$ 1,431
Other noncurrent liabilities	6,475	6,100		6,100
Total environmental remediation liabilities	$ 7,878	$ 7,443		$ 7,531