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PROPERTY AND EQUIPMENT, NET (NARRATIVE) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 27, 2015
Mar. 28, 2014
Dec. 26, 2014
Property, Plant and Equipment [Line Items]      
Capitalized computer software, net $ 28.7us-gaap_CapitalizedComputerSoftwareNet   $ 30.2us-gaap_CapitalizedComputerSoftwareNet
Depreciation expense $ 5.4us-gaap_DepreciationNonproduction $ 3.7us-gaap_DepreciationNonproduction