LONG TERM DEBT AND CAPITAL LEASES (Details) (USD $)	6 Months Ended		6 Months Ended		6 Months Ended			6 Months Ended		6 Months Ended
	May 31, 2011	Nov. 29, 2011	Nov. 29, 2011 Line of Credit [Member]	May 31, 2011 Line of Credit [Member]	Nov. 29, 2011 Line of Credit [Member] Line of Credit Amendment [Member]	Nov. 29, 2011 Line of Credit [Member] SwingLine[Member]	Nov. 29, 2011 Line of Credit [Member] Franchise Facility [Member]	Nov. 29, 2011 Series B Senior Notes due April 2013 [Member]	May 31, 2011 Series B Senior Notes due April 2013 [Member]	Nov. 29, 2011 Mortgages [Member]	May 31, 2011 Mortgages [Member]	Nov. 29, 2011 Capital Lease Obligations [Member]	May 31, 2011 Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Long-term debt	$ 344,274,000	$ 342,157,000	$ 182,000,000	$ 177,000,000				$ 44,442,000	$ 44,442,000	$ 115,471,000	$ 122,546,000	$ 244,000	$ 286,000
Less current maturities	15,090,000	17,357,000
Long-term debt and capital leases, less current maturities	329,184,000	324,800,000
Line of credit initiation date			2010-12-01		2011-07-19
Revolving credit agreement (in years)			5Y
Revolving credit facility, borrowing capacity	320,000,000				370,000,000
Option to increase line of credit borrowing capacity, additional amount	50,000,000				60,000,000
Option to increase line of credit borrowing capacity, adjusted amount	370,000,000				380,000,000
Increase to revolving commitments					380,000,000
Credit facility Sub-commitment agreement	50,000,000					40,000,000	50,000,000
Revolving credit facility borrowing rate			The interest rates charged on borrowings pursuant to the Credit Facility can vary depending on the interest rate option we choose to utilize. Our Base Rate for borrowings is defined to be the higher of Bank of America's prime rate, the Federal Funds Rate plus 0.5%, or an adjusted LIBO Rate plus 1.00%, plus an applicable margin ranging from 0.25% to 1.25%. The applicable margin for our Eurodollar Borrowings ranges from 1.25% to 2.25%.
Floating rate of interest (in hundredths)			2.58%	2.27%
Line of credit facility, remaining borrowing capacity			188,700,000
Maturity date of long-term debt			Dec. 01, 2015					Apr. 01, 2013
Issuance of notes payable								150,000,000
Interest rate of long-term debt (in hundredths)								7.17%	7.17%
Maturity date range of debt, start										2011-12-31
Maturity date range of debt, end										2024-03-31
Range of loan balances, maximum										$ 8,500,000
Interest rates of loans, minimum (in hundredths)										3.35%
Interest rates of loans, maximum (in hundredths)										11.28%