EMPLOYEE BENEFITS (Details) (USD $)	1 Months Ended	3 Months Ended
	Jan. 31, 2014	Mar. 29, 2015	Mar. 30, 2014
EMPLOYEE BENEFITS
Number of new participants		0
Retirement expense for continuing operations
Net pension expense		$ 2,493,000	$ 1,158,000
Pension plan
Retirement expense for continuing operations
Service cost		2,920,000	2,008,000
Interest cost		21,248,000	22,751,000
Expected return on plan assets		(26,571,000)	(26,865,000)
Prior service cost amortization			3,000
Actuarial loss		5,549,000	4,002,000
Net pension expense		3,146,000	1,899,000
Value of contributions to plan	25,000,000
Post-retirement plans
Retirement expense for continuing operations
Net pension expense		$ (653,000)	$ (741,000)