Annual report pursuant to Section 13 and 15(d)

AMAK ASSET RETIREMENT OBLIGATIONS - Narrative (Details)

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AMAK ASSET RETIREMENT OBLIGATIONS - Narrative (Details) - AMAK - SAR (ر.س)
ر.س in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]        
ARO recorded for deferred mine closure costs       ر.س 12,843
Amortization expense ر.س 745 ر.س 1,117 ر.س 1,117