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Distributions of Available Cash (Details) (USD $)
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 24, 2011
Jun. 25, 2011
Mar. 26, 2011
Dec. 25, 2010
Sep. 25, 2010
Jun. 26, 2010
Mar. 27, 2010
Dec. 26, 2009
Sep. 26, 2009
Jun. 27, 2009
Mar. 28, 2009
Dec. 27, 2008
Mar. 24, 2012
Sep. 24, 2011
Distributions of Available Cash [Abstract]                            
Distributions to its partners (in days)                         45D 45D
Declaration date of quarterly distribution                         April 19, 2012  
Quarterly distribution (in dollars per unit) $ 0.8525 $ 0.8525 $ 0.8525 $ 0.8525 $ 0.8500 $ 0.8450 $ 0.8400 $ 0.8350 $ 0.8300 $ 0.8250 $ 0.8150 $ 0.8100 $ 0.8525  
Common Unit distribution on an annualized basis (in dollars per unit)                         $ 3.41  
Distribution date of quarterly distribution                         May 8, 2012  
Date of record of quarterly distribution                         May 1, 2012