Fair Value Of Financial Instruments (Tables)

3 Months Ended

12 Months Ended

Nov. 30, 2011

Aug. 31, 2011

Fair Value Of Financial Instruments [Abstract]

Financial Assets Measured At Fair Value On A Recurring Basis

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
							Total
Assets:
Cash equivalents	$	7,103	$	—	$	—	$	7,103
Restricted cash (current)		10,566		—		—		10,566
Restricted cash (noncurrent)		8,059		—		—		8,059
Total	$	25,728	$	—	$	—	$	25,728

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
							Total
Assets:
Cash equivalents	$	11,338	$	—	$	—	$	11,338
Restricted cash (current)		12,850		—		—		12,850
Restricted cash (noncurrent)		8,108		—		—		8,108
Total	$	32,296	$	—	$	—	$	32,296