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INTANGIBLE ASSETS
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
INTANGIBLE ASSETS
INTANGIBLE ASSETS
 
Intangible Assets
 
Intangible assets activity for three years ended December 31, 2017 is summarized as follows:
 
 
Total
Balance at January 1, 2015
$
54,817

Amortization
(4,600
)
Balance at December 31, 2015
50,217

Amortization
(4,600
)
Balance at December 31, 2016
45,617

Amortization
(4,600
)
Balance at December 31, 2017
$
41,017


 
As discussed in Note 3, “Summary of Significant Accounting Policies,” the Company’s intangible assets at December 31, 2017 and 2016 consist of long-term customer relationships acquired as part of the 2006 purchase of Maritrans, Inc. The gross intangible assets were $92,000 at December 31, 2017 and 2016. The unamortized balance of the Company's intangible assets will be recognized over the remaining useful life, which is 9 years. Amortization of intangible assets for the 5 years subsequent to December 31, 2017 is expected to approximate $4,600 per year.