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Stockholders' Equity (Noncontrolling Interests) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 27, 2015
Dec. 28, 2014
Dec. 31, 2013
Noncontrolling Interest [Line Items]      
Contributions from noncontrolling interests $ 3,635 $ 1,872 $ 27
Noncontrolling interests [Member]      
Noncontrolling Interest [Line Items]      
Contributions from noncontrolling interests $ 3,200