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Debt (Tables)
 12 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]  
Schedule of Interest Expense
The Company incurs interest costs, which include interest, maintenance fees and bank charges. The amount of costs incurred, capitalized, and expensed for the years ended December 31, 2017, 2016 and 2015, consisted of the following:
 
 
Years Ended December 31,
 
2017
 
2016
 
2015
Interest costs incurred
$
1,249

 
$
1,167

 
$
1,133

Less: Interest capitalized
(72
)
 
(20
)
 
(136
)
Interest expense
$
1,177

 
$
1,147

 
$
997