Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT IN AMAK AND DISCONTINUED OPERATIONS - Additional Information (Details)

v3.20.2
INVESTMENT IN AMAK AND DISCONTINUED OPERATIONS - Additional Information (Details)
ر.س in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
shares
Mar. 26, 2020
SAR (ر.س)
Mar. 26, 2020
USD ($)
shares
Sep. 22, 2019
SAR (ر.س)
Sep. 22, 2019
USD ($)
Sep. 30, 2020
SAR (ر.س)
Sep. 30, 2020
USD ($)
shares
Sep. 30, 2020
USD ($)
shares
Sep. 28, 2020
Dec. 31, 2019
USD ($)
Sep. 30, 1986
ر.س / $
Schedule of Equity Method Investments [Line Items]                      
Deposits forfeited             $ 1.5        
Term Loan Facility | Term Loan                      
Schedule of Equity Method Investments [Line Items]                      
Repayments of lines of credit $ 60.0                    
Long-term line of credit $ 30.0           $ 30.0 $ 30.0      
Saudi Industrial Development Fund Limited Guarantee                      
Schedule of Equity Method Investments [Line Items]                      
Loan guarantee 41.00%           41.00% 41.00%      
Foreign taxes                      
Schedule of Equity Method Investments [Line Items]                      
Income taxes payable $ 1.8   $ 0.3       $ 1.8 $ 1.8      
AMAK                      
Schedule of Equity Method Investments [Line Items]                      
Proceeds from sale of investment   ر.س 40 $ 10.7 ر.س 265 $ 70.0 ر.س 224 59.9        
Percentage of ownership                   33.30%  
Investment in equity method investment                   $ 32.9  
Non-refundable deposit of amount sold, percentage               5.00%      
Non-refundable deposit of amount sold $ 3.5           $ 3.5 $ 3.5      
Percentage of non-refundable deposit forfeited prior to long stop date                 50.00%    
Equity method investment, shares sold (in shares) | shares 22,467,422   4,000,000       22,467,422 22,467,422      
Proceeds from sales deposit of equity method investments     $ 0.5       $ 1.5        
Purchase price held by purchaser for tax obligations $ 2.1           $ 2.1 $ 2.1      
Foreign currency exchange rate | ر.س / $                     3.75
AMAK | Foreign taxes                      
Schedule of Equity Method Investments [Line Items]                      
Foreign income tax expense $ 0.2