Trade receivables (Tables)

12 Months Ended

Dec. 31, 2017

Trade receivables [Abstract]

Summary of trade receivables

Trade receivables at December 31, 2017 and 2016, are summarized as follows:

	2017			2016
Maritime
Parcel tankers	$	44,024		$	42,069
Shipyards		30,015			23,781
Offshore vessels		28,716			496,579
Tugboats		12,401			25,440
Bulk Carrier		10,698			-
Tankers		-			84,313
Others		25			26
Ports and terminals
Shipping agencies		48,648			78,602
Port services		6,717			13,654
Commercial leases		434			599
Logistics, warehousing and other businesses
Warehousing		55,848			37,415
Repair of containers		40,730			27,471
Automotive services		689			891
Other businesses		2			882
Total trade receivables		278,947			831,722
Allowance for doubtful accounts		(28,310	)		(35,353	)
	$	250,637		$	796,369