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Provisions (Tables)

12 Months Ended

Dec. 31, 2017

Provisions [abstract]

Schedule of provisions

This caption is made up as follows:

		Workers’ profit-sharing				Long-term incentive plan				Rehabilitation provision				Total
		S/(000)				S/(000)				S/(000)				S/(000)

At January 1, 2017			17,018				34,368				2,367				53,753
Additions, notes 21 and 25			21,554				11,401				—				32,955
Change in estimates, note 22			—				477				45				522
Payments and advances			(18,425	)			(15,924	)			(13	)			(34,362	)

At December 31, 2017			20,147				30,322				2,399				52,868

Current portion			20,147				4,200				228				24,575
Non-current portion			—				26,122				2,171				28,293

			20,147				30,322				2,399				52,868

At January 1, 2016			21,273				36,906				3,339				61,518
Additions, notes 21 and 25			18,692				16,088				1,488				36,268
Change in estimates, note 22			—				—				5,259				5,259
Unwinding of discount, note 24			—				345				—				345
Payments and advances			(22,947	)			(18,971	)			(7,719	)			(49,637	)

At December 31, 2016			17,018				34,368				2,367				53,753

Current portion			17,018				13,817				876				31,711
Non-current portion			—				20,551				1,491				22,042

			17,018				34,368				2,367				53,753