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Debt (Tables)
 12 Months Ended
Dec. 31, 2014
Debt Disclosure [Abstract]  
Schedule of interest costs incurred, capitalized, and expensed
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, 2014, 2013 and 2012, consisted of the following:
 
(in thousands) 
 
Years Ended December 31,
 
2014
 
2013
 
2012
Interest costs incurred
$
953

 
$
1,019

 
$
909

Less: Interest capitalized
(98
)
 
(118
)
 
(116
)
Interest expense
$
855

 
$
901

 
$
793