EMPLOYEE BENEFITS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014 item	Mar. 31, 2013
EMPLOYEE BENEFITS
Number of new participants	0
Retirement expense for continuing operations
Net retirement expense	$ 1,158	$ 3,000
Pension plan
Retirement expense for continuing operations
Service cost	2,008	1,400
Interest cost	22,751	21,125
Expected return on plan assets	(26,865)	(25,275)
Prior service cost amortization	3
Actuarial loss	4,002	6,375
Net retirement expense	1,899	3,625
Post-retirement plans
Retirement expense for continuing operations
Net retirement expense	$ (741)	$ (625)