Fair Value Measurements (Tables)

9 Months Ended

May 31, 2013

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 May 31, 2013:

			Fair Value Measurements at Reporting Date Using
	May 31, 2013		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	$	893,758	$	893,758	$	—	$	—
Other assets:
Auction-rate securities	5,946		—		—		5,946
Total assets at fair value on a recurring basis	$	899,704	$	893,758	$	—	$	5,946
Liabilities:
Other long-term liabilities:
Contingent payment	$	6,022	$	—	$	—	$	6,022
Total liabilities at fair value on a recurring basis	$	6,022	$	—	$	—	$	6,022

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 liabilities measured on recurring basis, unobservable input reconciliation

The following summarizes the changes in liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3):

($ in thousands)
Balance at August 31, 2012	$	—
Purchase of noncontrolling interest	6,000
Change in fair value included in net income	22
Balance at May 31, 2013	$	6,022

Fair value assets and liabilities measured on non-recurring basis

Liabilities measured at fair value on a nonrecurring basis during the nine months ended May 31, 2013 consist of the following:

			Fair Value Measurements at Measurement Dates Using
($ in thousands)	Fair Value at Measurement Dates		Quoted Prices in Active Markets for Identical Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Losses for Nine Months Ended May 31, 2013
Other liabilities:
Initial lease obligations	$	57,596	$	—	$	—	$	57,596	$	57,596
Total liabilities at fair value on a nonrecurring basis	$	57,596	$	—	$	—	$	57,596	$	57,596