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Income tax and deferred taxes (Details 10) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of accounting profit multiplied by applicable tax rates [abstract]
Consolidated income before taxes		$ 390,622	$ 621,038	$ 594,590
Income tax rate in force in Chile		27.00%	27.00%	255.00%
Tax expense using the legal rate		$ (105,468)	$ (167,680)	$ (151,620)
Effect of royalty tax payments		(4,314)	(4,919)	(3,372)
Tax effect of revenue from regular activities exempt from taxation		2,376	1,446	2,886
Tax rate effect of non-tax-deductible expenses for determining taxable profit (loss)		(2,128)	(2,327)	(4,764)
Tax effect of tax rates supported abroad		(252)	3,517	(8,061)
IRS provision surplus	[1]	0	(3,724)	0
Other tax effects from the reconciliation between the accounting income and tax expense		(233)	(5,288)	(1,242)
Tax expense using the effective rate		$ (110,019)	$ (178,975)	$ (166,173)
[1] Internal revenue service

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The amount of profit (loss) for a period before deducting tax expense. [Refer: Profit (loss)]

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The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to expenses not deductible in determining taxable profit (tax loss). [Refer: Accounting profit]

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