PENSION AND OTHER POSTRETIREMENT BENEFITS (Schedule of Unrecognized Benefit Amounts) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Pension Plans, Defined Benefit [Member]
Net actuarial loss (gain), beginning of year	$ 53,368	$ 31,108	$ 9,708
Amortization	(1,001)	(465)	(96)
Curtailment and settlement adjustments
Actuarial loss (gain)	(24,315)	24,872	12,072
Asset loss (gain)	(11,095)	(2,147)	9,424
Net actuarial loss (gain), end of year	16,957	53,368	31,108
Net prior service cost, beginning of year			19
Amortization			(19)
Net prior service cost, end of year
Other Postretirement Benefit Plans, Defined Benefit [Member]
Net actuarial loss (gain), beginning of year	(49)	(217)	(47)
Amortization		2
Curtailment and settlement adjustments	15	7
Actuarial loss (gain)	(92)	159	(170)
Asset loss (gain)
Net actuarial loss (gain), end of year	(126)	(49)	(217)
Net prior service cost, beginning of year
Amortization
Net prior service cost, end of year