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STOCK-BASED COMPENSATION (Tables)
9 Months Ended
Sep. 23, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of restricted and unrestricted stock and performance share units activity
Restricted and unrestricted stock awards and performance share units activity for the thirty-nine weeks ended September 23, 2016, was as follows (shares in thousands):
 
Shares
 
Weighted- average grant-date price
Non-vested at beginning of period
1,218

 
$
22.63

Granted
577

 
$
21.58

Vested
(473
)
 
$
20.75

Forfeited
(87
)
 
$
21.42

Non-vested at the end of the period
1,235

 
$
22.84