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Pensions and Other Benefits (Tables)
3 Months Ended
Mar. 31, 2012
Pensions and Other Benefits [Abstract]  
Schedule of Net Periodic Benefit Plan Cost
    Pension Plans   Other Postretirement Benefits
(in thousands)   2012     2011     2012     2011  
                 
Service cost   $849     $849     $268     $228  
Interest cost   4,602     5,034     922     955  
Expected return on plan assets   (4,168 )   (3,981 )   -     -  
                         
Amortization:                        
  Transition obligation   19     22     -     -  
  Prior service cost/(credit)   9     9     (917 )   (917 )
  Net actuarial loss   1,773     1,422     804     753  
                         
Settlement charge   9,175     -     -     -  
Net periodic benefit costs   $12,259     $3,355     $1,077     $1,019