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FINANCIAL INSTRUMENTS - Carrying Value and Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Balance Sheet Grouping, Financial Statement Captions    
Current maturities of long-term debt $ (84,906) $ (100,500)
2022 Exchangeable Notes | Senior Notes    
Balance Sheet Grouping, Financial Statement Captions    
Current maturities of long-term debt (84,588) (99,927)
Long-term debt, net 0 0
Aggregate principal amount 100 15,600
2026 Exchangeable Notes | Senior Notes    
Balance Sheet Grouping, Financial Statement Captions    
Current maturities of long-term debt 0 0
Long-term debt, net (568,256) (567,870)
2030 Exchangeable Notes | Senior Notes    
Balance Sheet Grouping, Financial Statement Captions    
Current maturities of long-term debt 0 0
Long-term debt, net (566,607) (566,362)
Carrying Value    
Balance Sheet Grouping, Financial Statement Captions    
Current maturities of long-term debt (84,488) (84,333)
Long-term debt, net (3,830,965) (3,829,421)
Unamortized debt issuance costs, current 300 600
Unamortized original issue discount and debt issuance costs 44,000 45,600
Fair Value    
Balance Sheet Grouping, Financial Statement Captions    
Current maturities of long-term debt (209,505) (254,472)
Long-term debt, net (4,289,386) (4,772,140)
Fair Value | 2022 Exchangeable Notes    
Balance Sheet Grouping, Financial Statement Captions    
Long-term debt fair value 209,500 302,200
Fair Value | 2026 Exchangeable Notes    
Balance Sheet Grouping, Financial Statement Captions    
Long-term debt fair value 802,800 932,600
Fair Value | 2030 Exchangeable Notes    
Balance Sheet Grouping, Financial Statement Captions    
Long-term debt fair value $ 867,600 $ 1,017,700