Note 7 - Long Term Debt (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 19, 2011	Nov. 30, 2011
Secured Long-term Debt, Noncurrent (in Dollars)	$ 615
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	100
Letters of Credit Outstanding, Amount (in Dollars)	25.0
Debt Instrument, Unused Borrowing Capacity, Description	$150.0
Line of Credit Facility, Interest Rate at Period End		7.25%
Debt Instrument, Interest Rate, Stated Percentage	11.125%
Minimum [Member]
Line of Credit Facility, Interest Rate at Period End	1.50%
Federal Funds Effective Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	0.50%
Debt Instrument, Interest Rate at Period End		4.75%
Notes Payable, Other Payables [Member]
Debt Instrument, Face Amount (in Dollars)	$ 400
LIBOR Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Debt Instrument, Interest Rate at Period End		5.75%