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Distributions of Available Cash (Details) (USD $)
3 Months Ended12 Months Ended
Sep. 24, 2011
Jun. 25, 2011
Mar. 26, 2011
Dec. 25, 2010
Sep. 25, 2010
Jun. 26, 2010
Mar. 27, 2010
Dec. 26, 2009
Sep. 26, 2009
Jun. 27, 2009
Mar. 28, 2009
Dec. 27, 2008
Sep. 24, 2011
Distributions of Available Cash [Abstract]             
Distributions to its partners (in days)            45D
Distributions paid (in dollars per unit)$ 0.8525$ 0.8525$ 0.8525$ 0.8525$ 0.8500$ 0.8450$ 0.8400$ 0.8350$ 0.8300$ 0.8250$ 0.8150$ 0.8100 
Distributions declared (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