Annual report pursuant to Section 13 and 15(d)

AMAK LONG-TERM DEBT - Narrative (Details)

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AMAK LONG-TERM DEBT - Narrative (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2018
SAR (ر.س)
Dec. 31, 2017
USD ($)
Dec. 31, 2017
SAR (ر.س)
Dec. 31, 2016
USD ($)
Dec. 31, 2016
SAR (ر.س)
Dec. 31, 2018
SAR (ر.س)
Dec. 31, 2017
SAR (ر.س)
Dec. 31, 2010
SAR (ر.س)
Debt Instrument [Line Items]                  
Loan fees | $ $ 830   $ 501            
Amortization of loan fees | $ $ 261   $ 247   $ 272        
AMAK                  
Debt Instrument [Line Items]                  
Loan fees             ر.س 8,741,288 ر.س 10,917,190  
Amortization of loan fees   ر.س 2,175,902   ر.س 1,610,733   ر.س 2,147,644      
Secured Debt | Loan agreement with SIDF | AMAK                  
Debt Instrument [Line Items]                  
Collateralized loan agreement                 ر.س 330,000,000
Loan fees             ر.س 8,741,288 ر.س 10,917,190  
Amortization of loan fees   ر.س 1,639,000   ر.س 1,611,000   ر.س 2,148,000