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Debt (Schedule of Obligations Under Debt Arrangements) (Details)
$ in Thousands
Jun. 30, 2024
USD ($)
May 09, 2024
Dec. 31, 2023
USD ($)
Jan. 25, 2023
May 17, 2022
Debt Instrument [Line Items]          
Principal $ 4,014,590   $ 3,823,215    
Unamortized Premium, Discount and Debt Issuance Costs 65,196   58,751    
Net Value 3,949,394   3,764,464    
5.875% Alkali senior secured notes due 2042(2)          
Debt Instrument [Line Items]          
Principal 400,000        
Credit Facility | Revolving Credit Facility | Revolving Loan          
Debt Instrument [Line Items]          
Principal 134,800   298,300    
Unamortized Premium, Discount and Debt Issuance Costs 0   0    
Net Value 134,800   298,300    
Unamortized debt issuance costs 4,300   5,700    
Senior Notes | 6.250% senior unsecured notes due 2026          
Debt Instrument [Line Items]          
Principal 0   339,310    
Unamortized Premium, Discount and Debt Issuance Costs 0   1,746    
Net Value $ 0   337,564    
Interest rate 6.25%        
Senior Notes | 8.000% senior unsecured notes due 2027          
Debt Instrument [Line Items]          
Principal $ 981,245   981,245    
Unamortized Premium, Discount and Debt Issuance Costs 2,888   3,549    
Net Value $ 978,357   977,696    
Interest rate 8.00%        
Senior Notes | 7.750% senior unsecured notes due 2028          
Debt Instrument [Line Items]          
Principal $ 679,360   679,360    
Unamortized Premium, Discount and Debt Issuance Costs 5,372   6,121    
Net Value $ 673,988   673,239    
Interest rate 7.75%        
Senior Notes | 5.875% Alkali senior secured notes due 2042(2)          
Debt Instrument [Line Items]          
Principal $ 419,185   425,000    
Unamortized Premium, Discount and Debt Issuance Costs 21,395   21,791    
Net Value $ 397,790   403,209    
Interest rate 5.875%        
Interest rate, limited term percentage         10
Senior Notes | 8.250% Senior Unsecured Notes Due 2029          
Debt Instrument [Line Items]          
Principal $ 600,000   600,000    
Unamortized Premium, Discount and Debt Issuance Costs 15,610   17,202    
Net Value $ 584,390   582,798    
Interest rate 8.25%        
2030 Notes | Senior Notes          
Debt Instrument [Line Items]          
Principal $ 500,000   500,000    
Unamortized Premium, Discount and Debt Issuance Costs 7,678   8,342    
Net Value $ 492,322   491,658    
Interest rate 8.875%     8.875%  
2032 Notes | Senior Notes          
Debt Instrument [Line Items]          
Principal $ 700,000   0    
Unamortized Premium, Discount and Debt Issuance Costs 12,253   0    
Net Value $ 687,747   $ 0    
Interest rate 7.875% 7.875%