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Share-based Compensation (Tables)
 6 Months Ended
Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of share-based compensation expense
The following table presents the amounts incurred by ARI for share-based compensation, related to stock appreciation rights (SARs), and the corresponding line items on the condensed consolidated statements of operations that they are classified within: 
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
2017
 
2016
 
2017
 
2016
 
(in thousands)
Share-based compensation (income) expense
 
 
 
 
 
 
 
Cost of revenues: Manufacturing
$
(17
)
 
$
(56
)
 
$
(35
)
 
$
(173
)
Cost of revenues: Railcar services
(1
)
 
(2
)
 
(3
)
 
(17
)
Selling, general and administrative
(207
)
 
82

 
(434
)
 
(97
)
Total share-based compensation (income) expense
$
(225
)
 
$
24

 
$
(472
)
 
$
(287
)