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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Sep. 30, 2021
Jan. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Increase in liability as a result of increasing the profit element and risk premium input by 100 basis points $ 700      
Decrease in liability as a result of decreasing the profit element and risk premium input by 100 basis points 700      
Increase in liability as a result of decreasing the discount rate by 100 basis points 2,900      
Decrease in liability as a result of increasing the discount rate by 100 basis points 3,100      
Debt Securities, One        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Investments in debt securities       $ 25,000
Debt Securities, Two        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Investments in debt securities     $ 13,000  
Level 2 | Recurring        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Investments in debt securities 0 $ 0    
Level 2 | Recurring | Convertible Notes | Notes due 2028        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Notes payable fair value 690,600      
Level 2 | Recurring | Convertible Notes | Notes due 2026        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Notes payable fair value 735,100      
Level 2 | Recurring | Convertible Notes | Notes due 2025        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Notes payable fair value $ 369,100