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FINANCING ARRANGEMENTS - Convertible Senior Notes (Details) - USD ($)
1 Months Ended
May 31, 2021
Apr. 30, 2021
May 31, 2016
Mar. 31, 2022
Dec. 31, 2021
Jun. 30, 2021
Mar. 31, 2021
Apr. 30, 2016
Debt Instrument [Line Items]                
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%        
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   $ 200,000,000  
Net proceeds from issuance of debt   222,100,000            
Proceeds from debt used for capped call transactions payment   $ 27,400,000       $ 3,600,000 23,800,000  
Debt issuance costs       $ 7,800,000   $ 1,000,000 $ 6,800,000  
Effective interest rate       1.83%        
Fair value of debt       $ 182,900,000 $ 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            
1.125% Convertible Senior Notes Due 2026, additional | Senior Notes                
Debt Instrument [Line Items]                
Principal amount   $ 30,000,000