Cash And Cash Equivalents (Tables)

12 Months Ended

Aug. 31, 2011

Aug. 31, 2010

Cash and Cash Equivalents [Abstract]

Summary Of Cash And Cash Equivalents

	Amortized Cost		Gross Unrealized Gain		Fair Value
Cash on hand	$	20,517	$	0	$	20,517
Corporate money market funds		161,168		0		161,168
Total cash and cash equivalents	$	181,685	$	0	$	181,685

	Amortized Cost		Gross Unrealized Gain		Fair Value
Cash on hand	$	23,523	$	0	$	23,523
Corporate money market funds		172,218		0		172,218
Total cash and cash equivalents	$	195,741	$	0	$	195,741