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Commitments and Contingencies (Operating Leases) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 27, 2015
Dec. 28, 2014
Dec. 31, 2013
Operating Leased Assets [Line Items]      
Rental expense [1] $ 164,754 $ 169,701 $ 156,720
Contingent rent expense $ 7,400 $ 8,000 $ 6,500
Minimum [Member]      
Operating Leased Assets [Line Items]      
Operating leases, renewal option, period 5 years    
Maximum [Member]      
Operating Leased Assets [Line Items]      
Operating leases, renewal option, period 30 years    
[1] Includes contingent rent expense of $7.4 million, $8.0 million and $6.5 million for fiscal years 2015, 2014 and 2013, respectively.