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PROPERTY AND EQUIPMENT, NET (NARRATIVE) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 23, 2016
Sep. 25, 2015
Sep. 23, 2016
Sep. 25, 2015
Dec. 25, 2015
Property, Plant and Equipment [Line Items]          
Capitalized computer software, net $ 16.9   $ 16.9   $ 24.6
Depreciation expense $ 5.4 $ 5.9 $ 15.5 $ 17.1