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Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2013
Compensation And Retirement Disclosure [Abstract]  
Components of Net Periodic Benefit Cost

Components of the net periodic benefit cost of the plan for the three and nine months ended September 30, 2013 and 2012 were as follows:

 

     (in thousands)  
     For the three months
ended September 30,
    For the nine months
ended September 30,
 
     2013     2012     2013     2012  

Service cost

   $ 118      $ 107      $ 352      $ 320   

Interest cost

     70        67        210        202   

Expected return on plan assets

     (76     (69     (227     (206

Amortization of prior service cost

     —          1        —          2   

Amortization of net loss

     27        21        82        64   
  

 

 

   

 

 

   

 

 

   

 

 

 

Net periodic benefit cost

   $ 139      $ 127      $ 417      $ 382