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Employee Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2014
Compensation And Retirement Disclosure [Abstract]  
Components of Net Benefit Cost (Credit)

The following table summarizes the components of net periodic benefit cost (credit) related to the Company’s post-retirement plans for the three month and six month periods ended June 30, 2014 and 2013:

 

    Pension Plans     Medical Plan  
    Three Months Ended June 30,  
    2014     2013     2014     2013  

Components of Net Benefit Cost (Credit):

       

Service cost

  $ 228      $ 309      $ 5      $ 17   

Interest cost

    7,640        6,689        44        44   

Expected return on plan assets

    (8,228     (6,585              

Amortization of:

       

Prior service cost

    735        700                 

Net actuarial loss

    1,118        912        (242       
 

 

 

   

 

 

   

 

 

   

 

 

 

Net benefit cost

  $ 1,493      $ 2,025      $ (193   $ 61   
 

 

 

   

 

 

   

 

 

   

 

 

 

 

    Pension Plans     Medical Plan  
    Six Months Ended June 30,  
    2014     2013     2014     2013  

Components of Net Benefit Cost (Credit):

       

Service cost

  $ 451      $ 623      $ 17      $ 27   

Interest cost

    15,171        13,442        97        91   

Expected return on plan assets

    (16,307     (13,382              

Amortization of:

       

Prior service cost

    1,468        1,406                 

Net actuarial loss

    2,229        1,826        (265       
 

 

 

   

 

 

   

 

 

   

 

 

 

Net benefit cost

  $ 3,012      $ 3,915      $ (151   $ 118