Quarterly report pursuant to Section 13 or 15(d)

Pension Plans (Details)

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Pension Plans (Details) (USD $)
3 Months Ended
Mar. 31, 2012
Apr. 02, 2011
Pension Plans [Abstract]    
Service cost - benefits earned during the year $ 5,811,000 $ 5,182,000
Interest cost on projected benefit obligations 19,249,000 19,705,000
Expected return on plan assets (20,156,000) (22,416,000)
Amortization of deferred amounts: Net deferred actuarial losses 17,618,000 10,764,000
Amortization of deferred amounts: Deferred prior service cost 839,000 863,000
Net periodic pension cost 23,361,000 14,098,000
VF contributions 5,500,000  
Additional VF contribution in remainder of 2012 $ 9,100,000