Fair Value Measurements (Tables)

3 Months Ended

Nov. 30, 2012

Fair Value Disclosures [Abstract]

Fair value assets and liabilities measured on recurring basis

Assets and liabilities measured at fair value on a recurring basis consist of the following as of November 30, 2012:

			Fair Value Measurements at Reporting Date Using
	November 30, 2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
($ in thousands)
Assets:
Cash equivalents (including restricted cash equivalents):
Money market funds	$	900,056	$	900,056	$	—	$	—
Other assets:
Auction-rate securities	5,946		—		—		5,946
Total assets at fair value on a recurring basis	$	906,002	$	900,056	$	—	$	5,946
Liabilities:
Other long-term liabilities:
Contingent payment	$	6,000	$	—	$	—	$	6,000
Total liabilities at fair value on a recurring basis	$	6,000	$	—	$	—	$	6,000

Assets measured at fair value on a recurring basis consist of the following as of August 31, 2012:

			Fair Value Measurements at Reporting Date Using
	August 31, 2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
($ in thousands)
Cash equivalents (including restricted cash equivalents):
Money market funds	$	629,166	$	629,166	$	—	$	—
Other assets:
Auction-rate securities	5,946		—		—		5,946
Total assets at fair value on a recurring basis	$	635,112	$	629,166	$	—	$	5,946

Fair value assets and liabilities measured on non-recurring basis

Liabilities measured at fair value on a nonrecurring basis during the first quarter of fiscal year 2013 consist of the following:

			Fair Value Measurements at Measurement Date Using
($ in thousands)	Fair Value at Measurement Date		Quoted Prices in Active Markets for Identical Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Losses for Three Months Ended November 30, 2012
Other liabilities:
Initial lease obligation included in restructuring	$	422	$	—	$	—	$	422	$	422
Total liabilities at fair value on a nonrecurring basis	$	422	$	—	$	—	$	422	$	422