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EMPLOYEE BENEFIT PLANS (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Pension Plans [Member]
   
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Interest cost on accumulated benefit obligation $ 584 $ 597
Expected return on assets (764) (713)
Amortization of net actuarial loss (gain) 207 178
Net periodic pension cost 27 62
Post-retirement Benefit [Member]
   
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Service cost - benefits attributed to service during the period 40 17
Interest cost on accumulated benefit obligation 58 53
Amortization of net actuarial loss (gain) (34) (18)
Net periodic pension cost $ 64 $ 52