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STOCK-BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 26, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of restricted and unrestricted stock and performance share units activity
Restricted and unrestricted stock and performance share units activity for the thirty-nine weeks ended September 26, 2014 was as follows (shares in thousands):
 
Shares
 
Weighted- average grant-date price
Non-vested at beginning of period
1,544

 
$
16.66

Granted
515

 
$
26.11

Vested
(414
)
 
$
17.78

Forfeited
(39
)
 
$
18.58

Non-vested at the end of the period
1,606

 
$
19.35