Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION (Details)

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BASIS OF PRESENTATION (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 25, 2011
Sep. 30, 2012
Sep. 25, 2011
BASIS OF PRESENTATION        
Number of days in each interim period 91 days 91 days 273 days 266 days
Options excluded (in shares) 599,637 285,937 412,318 142,750