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Derivative Instruments (Tables)
9 Months Ended
Sep. 30, 2017
Derivatives, Fair Value [Line Items]  
Schedule of Derivative Liabilities at Fair Value [Table Text Block]
The fair values of outstanding derivative instruments are as follows:
 
Fair Value of Derivatives
 
 
 
September 30, 2017
 
December 31, 2016
 
Balance Sheet Classification
Derivatives designated as hedges:
 
 
 
 
 
5 year interest rate swap
$
62

 
$
211

 
Other long-term liabilities
10 year interest rate swap
809

 
835

 
Other long-term liabilities
 
$
871

 
$
1,046