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Prepaid expenses (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Prepaid expenses [Abstract]

Disclosure of detailed information about prepaid expenses [Text Block]

(a)

This caption is made up as follows:

	2018		2017
	US$(000)		US$(000)

Prepaid rentals (b)		27,464		28,349
Prepaid insurances		12,486		12,401
Deferred costs of works for taxes		2,407		2,013
Other prepaid expenses		1,366		2,343

		43,723		45,106

Classification by maturity:
Current portion		17,145		17,551
Non-current portion		26,578		27,555

		43,723		45,106

(b)

This item corresponds to the balance of an original prepayment of US$31 million for the lease of hydraulic installations by the subsidiary Empresa de Generacion Huanza S.A. This prepayment is being charged to results during the life of the underlying assets (35 years) since January 2015.