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PROPERTY AND EQUIPMENT, NET (NARRATIVE) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 25, 2015
Sep. 26, 2014
Sep. 25, 2015
Sep. 26, 2014
Dec. 26, 2014
Property, Plant and Equipment [Line Items]          
Capitalized computer software, net $ 25.3   $ 25.3   $ 30.2
Depreciation expense $ 5.9 $ 5.1 $ 17.1 $ 12.5