PENSION AND OTHER POSTRETIREMENT BENEFITS (Schedule of Net Defined Benefit Pension and Other Postretirement Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 10
Interest cost	2,026	1,988
Estimated return on plan assets	(1,593)	(1,349)
Amortization of net loss (gain)	14	250
Net costs	447	899
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost
Interest cost	20	20
Estimated return on plan assets
Amortization of net loss (gain)
Net costs	$ 20	$ 20