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Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2012
Employee Benefit Plans [Abstract]  
Components Of Net Periodic Benefit Cost
(THOUSANDS OF DOLLARS)
 
THREE MONTHS ENDED
 
 
MARCH 31, 2012
 
APRIL 2, 2011
Service cost
 $12
 
 $12
Interest cost
 560
 
 554
Expected return on plan assets
 (577)
 
 (559)
Amortization of unrecognized loss
 288
 
 239
Amortization of prior service cost
 3
 
 3
Net Periodic Benefit Cost
 $286
 
 $249