Fair Value Of Financial Instruments (Tables)

3 Months Ended

Nov. 30, 2012

Fair Values 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
November 30, 2012
Assets:
Cash equivalents	$	13,180	$	—	$	—	$	13,180
Restricted cash (current)		8,092		—		—		8,092
Restricted cash (noncurrent)		7,855		—		—		7,855
Total	$	29,127	$	—	$	—	$	29,127
August 31, 2012
Assets:
Cash equivalents	$	7,784	$	—	$	—	$	7,784
Restricted cash (current)		10,200		—		—		10,200
Restricted cash (noncurrent)		7,903		—		—		7,903
Total	$	25,887	$	—	$	—	$	25,887