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Benefit Plans (Tables)
6 Months Ended
Jun. 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 six months ended June 30, 2013 and 2012 were as follows:

 

     (in thousands)  
     For the three months
ended June 30,
    For the six months
ended June 30,
 
     2013     2012     2013     2012  

Service cost

   $ 118      $ 107      $ 236      $ 214   

Interest cost

     70        67        140        135   

Expected return on plan assets

     (76     (69     (152     (138

Amortization of prior service cost

     —          1        —          1   

Amortization of net loss

     27        21        54        43   
  

 

 

   

 

 

   

 

 

   

 

 

 

Net periodic benefit cost

   $ 139      $ 127      $ 278      $ 255