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Other Operating Income, net
12 Months Ended
Dec. 31, 2016
Other Income and Expenses [Abstract]  
Other Operating Income, net

9.       Other Operating Income, net

 

Other operating income, net consists of the following:

 

Year ended December 31,  2016   2015   2014 
             
Gain on sale of operating assets  $5   $113   $1 
Frozen defined-benefit pension plan income           1,611 
Total other operating income, net  $5   $113   $1,612