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Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2016
Accumulated Other Comprehensive Loss [Abstract]  
Accumulated Other Comprehensive Loss [Table Text Block]



 

 

 

 



 

 

 

 



 

2016

 

2015



 

 

Pension and post-retirement benefit plan adjustments

$

 (4,439)

$

 (3,069)

Unrealized loss on interest rate swap contracts

 

 (204)

 

 (121)

Foreign currency translation adjustments

 

 (20,646)

 

 (14,750)



$

 (25,289)

$

 (17,940)