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Pension (Tables)
3 Months Ended
Mar. 31, 2013
Pension Tables  
Components of Net Benefit Expense

    Three Months Ended  
    March 31     March 31  
    2013     2012  
             
Components of net periodic benefit cost:            
Interest cost   $ 17     $ 21  
Service cost     9       9  
Expected return on plan assets     (27 )     (24 )
Amortization of prior service costs     2       2  
Amortization of actuarial loss     39       34  
    $ 40     $ 42