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FINANCING ARRANGEMENTS - Convertible Senior Notes (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2021
Apr. 30, 2021
May 31, 2016
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Apr. 30, 2016
Debt Instrument [Line Items]                    
Loss on extinguishment of debt       $ 0 $ 5,090,000 $ 0 $ 5,090,000      
Cost of convertible note hedges     $ 59,100,000              
Proceeds from Issuance of Warrants     $ 35,500,000              
Cash received on hedges $ 2,300,000                  
Settlement of cash paid for warrants 1,300,000                  
3.25% Convertible Senior Notes due 2022 | Senior Notes                    
Debt Instrument [Line Items]                    
Stated interest rate                   3.25%
Principal amount                   $ 250,000,000
Aggregate purchase price 255,000,000                  
Repurchased debt outstanding principal amount 250,000,000                  
Accrued and unpaid interest 1,000,000                  
Debt repurchase prepayment penalty 4,000,000                  
Loss on extinguishment of debt $ 5,100,000                  
Effective interest rate       3.76%   3.76%        
1.125% Convertible Senior Notes Due 2026 | Senior Notes                    
Debt Instrument [Line Items]                    
Stated interest rate   1.125%                
Principal amount   $ 230,000,000   $ 230,000,000   $ 230,000,000   $ 230,000,000    
Net proceeds from issuance of debt   $ 222,100,000                
Proceeds from debt used for capped call transactions payment       27,400,000   27,400,000        
Debt issuance costs       $ 7,800,000   $ 7,800,000        
Effective interest rate       1.83%   1.83%        
Fair value of debt       $ 156,200,000   $ 156,200,000   $ 183,300,000    
Conversion price (in usd per share)                 $ 68.12  
Debt conversion price, premium on stock price   100.00%                
1.125% Convertible Senior Notes Due 2026 | Senior Notes | Maximum                    
Debt Instrument [Line Items]                    
Conversion price (in usd per share)   $ 104.80