Long Term Borrowings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 24, 2011	Sep. 24, 2011	Mar. 27, 2010
Debt Instrument [Line Items]
Long-term borrowings	$ 348,223	$ 348,169
Long-term debt maturities [Abstract]
Percentage of wholly-owned subsidiary (in hundredths)	100.00%
Long-term debt maturities, 2012	0
Long-term debt maturities, 2013	100,000
Long-term debt maturities, 2014	0
Long-term debt maturities, 2015	0
Long-term debt maturities, 2016	0
Long-term debt maturities thereafter	250,000
Interest rate swap agreement [Abstract]
Notional amount	100,000
Effective date	Mar. 31, 2010
Termination date	Jun. 25, 2013
Fixed interest rate (in hundredths)	3.12%
Credit Agreement and 2020 Senior Notes covenants [Abstract]
Consolidated interest coverage ratio, minimum	2.5 to 1.0
Total consolidated leverage ratio, maximum	4.5 to 1.0
Senior secured consolidated leverage ratio, maximum	3.0 to 1.0
Consolidated fixed charge coverage ratio, minimum	1.75 to 1
Debt Origination Costs [Abstract]
Capitalized debt origination costs	6,803	7,207
Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Long-term borrowings	248,223	248,169
Stated interest rate (in hundredths)	7.375%
Maturity date	Mar. 15, 2020
Unamortized discount	1,777	1,831
Date public offering completed		2010-03-23
Aggregate principal amount			250,000
Percentage of principal amount at which debt was issued (in hundredths)			99.136%
Percentage of the principal amount repurchase offer under change of control provision (in hundredths)	101.00%
Number of days after the consummation of the change of control that a rating decline may occur to trigger offer to repurchase debt (in days)	90D
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term borrowings	100,000	100,000
Maturity date	Jun. 25, 2013
Revolving Credit Facility, maximum amount	250,000
Revolving Credit Facility, term (in years)	4Y
Standby letters of credit issued under the Revolving Credit Facility	49,256
Outstanding standby letters of credit, maximum expiration date of outstanding	Jan. 15, 2013
Available borrowing capacity under Revolving Credit Facility	$ 100,744
Revolving Credit Facility, interest rate description	Facility bear interest at prevailing interest rates based upon, at the Operating Partnership's option, LIBOR plus the applicable margin or the base rate, defined as the higher of the Federal Funds Rate plus ½ of 1, the agent bank's prime rate, or LIBOR plus 1, plus in each case the applicable margin. The applicable margin is dependent upon the Partnership's ratio of total debt to EBITDA on a consolidated basis, as defined in the Revolving Credit Facility
Revolving Credit Facility, approximate interest rate at period end (in hundredths)	3.40%