Long Term Borrowings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended		9 Months Ended		3 Months Ended
	Jun. 25, 2011	Jun. 26, 2010	Jun. 25, 2011	Jun. 26, 2010	Sep. 25, 2010	Mar. 27, 2010 Senior Notes Due 2020 [Member]	Jun. 25, 2011 Senior Notes Due 2020 [Member]	Sep. 25, 2010 Senior Notes Due 2020 [Member]	Jun. 25, 2011 Revolving Credit Facility [Member]	Sep. 25, 2010 Revolving Credit Facility [Member]	Mar. 27, 2010 Senior Notes Due 2013 [Member]
Debt Instrument [Line Items]
Long-term borrowings	$ 348,115		$ 348,115		$ 347,953		$ 248,115	$ 247,953	$ 100,000	$ 100,000
Stated interest rate (in hundredths)							7.375%				6.875%
Maturity date							Mar. 15, 2020		Jun. 25, 2013		Dec. 15, 2013
Unamortized discount							1,885	2,047
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%
Loss on the extinguishment of debt, total	0	0	0	(9,473)							9,473
Loss on the extinguishment of debt related to repurchase premium and related fees											7,231
Loss on the extinguishment of debt related to write-off in unamortized debt origination costs and unamortized discount											2,242
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, maximum amount									250,000
Revolving Credit Facility, term (in years)									4Y
Standby letters of credit issued under the Revolving Credit Facility									54,856
Outstanding standby letters of credit, maximum expiration date of outstanding									Apr. 15, 2012
Available borrowing capacity under Revolving Credit Facility									95,144
Revolving Credit Facility, interest rate description									Borrowings under the Revolving Credit 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)									3.30%
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%
Revolving Credit Facility 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									7,694	9,157
Long-term debt maturities [Abstract]
Percentage of wholly-owned subsidiary (in hundredths)	100.00%		100.00%
Long-term debt maturities 2011 through 2012									0
Long-term debt maturities, 2013									100,000
Long-term debt maturities, 2014									0
Long-term debt maturities, 2015 and thereafter									$ 250,000