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Pension Benefits (Tables)
6 Months Ended
Jun. 30, 2016
Pension Benefits [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
The net periodic pension cost for the three and six months ended June 30, 2016 and 2015 were as follows (in thousands):
 
 
 
 
 
 
Three months ended
June 30,
 
Six months ended
June 30,
  
 
2016
 
2015
 
2016
 
2015
Components of net periodic benefit cost
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
Service cost
 
$
368
 
 
$
400
 
 
$
736
 
 
$
800
 
Interest cost
 
 
344
 
 
 
325
 
 
 
688
 
 
 
650
 
Expected return on plan assets
 
 
(563
 
 
(525
 
 
(1,126
 
 
(1,050
Recognized net actuarial loss
 
 
314
 
 
 
300
 
 
 
628
 
 
 
600
 
Net periodic pension cost
 
$
463
 
 
$
500
 
 
$
926
 
 
$
1,000