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Pension Benefits (Tables)
6 Months Ended
Jun. 30, 2015
Pension Benefits [Abstract]  
Schedule of Components of Net Periodic Benefit Cost

 

Three months ended Six months ended  
June 30, June 30,  
2015 2014     2015     2014  
Components of net periodic benefit cost                        
Service cost   $ 400     $ 430     $ 800     $ 860  
Interest cost     325       331       650       662  
Expected return on plan assets     (525 )     (498 )     (1,050 )     (996 )
Amortization of prior year service cost     -       (5 )     -       (10 )
Recognized net actuarial loss     300       272       600       544  
Net periodic pension cost   $ 500     $ 530     $ 1,000     $ 1,060