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Employee Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
The following table represents the components of net periodic pension (income) cost:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2014

2013
 
2014
 
2013
Interest cost
$
590

 
$
528

 
$
1,770

 
$
1,584

Expected return on plan assets
(776
)
 
(676
)
 
(2,328
)
 
(2,028
)
Amortization of net loss
80

 
337

 
240

 
1,011

Total net periodic pension (income) cost
$
(106
)
 
$
189

 
$
(318
)
 
$
567