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Concession rights
 12 Months Ended
Dec. 31, 2017
Concession rights [Abstract]  
Concession rights
12
Concession rights
 
The Company holds concessions to operate the cruise and vehicle terminal at the port of Acapulco, Guerrero and the tugboat services at the port of Manzanillo, Colima. Under these concession agreements, the Company is obliged to keep the facilities included in the concession in good condition. At the end of the concessions, these facilities will revert to the federal government.
 
Therefore, the concession rights and the partial rights assignments provide for rights in favor of the federal government (see Note 31).
 
At December 31, 2017 and 2016, the Company was in compliance with its obligation to maintain the concessioned facilities in good condition.
 
The concession rights at December 31, 2017 and 2016 are summarized as follows:
 
  
2017
  
2016
  
Years to
amortize
 
Administración Portuaria Integral de Acapulco (a)
 
$
94,607
  
$
94,607
   
10
 
Transportación Marítima Mexicana (b)
  
30,266
   
30,266
   
-
 
   
124,873
   
124,873
     
Accumulated amortization
  
(111,629
)
  
(107,844
)
    
Concession rights, net
 
$
13,244
  
$
17,029
     
 
The amortization of the concession rights was $3,785 for the years ended December 31, 2017 and 2016.
 
 (a)
Concession expires June 2021.
 
 (b)
Renewal expires January 16, 2023, with the possibility of renewing for another 8 years. In January 2007, the total value of this concession was amortized prior to the renewal. Accumulated amortization for this intangible asset is $30,266.