INCENTIVE COMPENSATION (Schedule of Restricted Share and Restricted Stock Unit Activity) (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 25, 2016	Dec. 27, 2015
RSAs
Number
Outstanding at beginning of year (in shares)	0	0	30
Granted (in shares)	0	0	0
Vested (in shares)	0	0	0
Forfeited (in shares)	0	0	(30)
Outstanding at end of year (in shares)	0	0	0
Weighted Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 0.00	$ 0.00	$ 8.72
Granted (in dollars per share)	0.00	0.00	0.00
Vested (in dollars per share)	0.00	0.00	0.00
Forfeited (in dollars per share)	0.00	0.00	8.72
Outstanding at end of period (in dollars per share)	$ 0.00	$ 0.00	$ 0.00
RSUs
Number
Outstanding at beginning of year (in shares)	906	774	1,120
Granted (in shares)	461	325	428
Vested (in shares)	(714)	0	(671)
Forfeited (in shares)	(264)	(193)	(103)
Outstanding at end of year (in shares)	389	906	774
Weighted Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 20.00	$ 18.78	$ 11.97
Granted (in dollars per share)	18.72	24.35	21.00
Vested (in dollars per share)	18.09	0.00	8.81
Forfeited (in dollars per share)	25.33	24.51	18.90
Outstanding at end of period (in dollars per share)	$ 18.39	$ 20.00	$ 18.78