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Long-term Debt - Additional Information (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
$ / shares
Mar. 31, 2021
USD ($)
day
$ / shares
Dec. 31, 2020
USD ($)
$ / shares
Jun. 30, 2020
Line of Credit Facility [Line Items]        
Common stock, par value (in dollars per share) | $ / shares   $ 0.0001 $ 0.0001  
Share price (in usd per share) | $ / shares   $ 65.71    
Increase in deferred tax asset valuation allowance   $ 12,000    
Decrease in deferred tax liabilities   12,000    
Reduction to accumulated deficit / increase to retained earnings   (562,211) $ (542,030)  
Cumulative Effect, Period of Adoption, Adjustment        
Line of Credit Facility [Line Items]        
Reduction to accumulated deficit / increase to retained earnings     $ 7,500  
Convertible Notes        
Line of Credit Facility [Line Items]        
Convertible debt fair value $ 169,500      
Interest rate of debt 9.35%      
Unamortized discount $ 60,500      
Debt issuance costs 7,400      
Debt issuance cost, equity component   1,900    
Debt issuance cost, liability component   $ 5,500    
Debt term   5 years    
Effective interest rate   3.30% 9.90%  
Term Loan Agreement        
Line of Credit Facility [Line Items]        
Repayments of debt 88,600      
Senior Notes | Convertible Notes        
Line of Credit Facility [Line Items]        
Debt instrument face amount 230,000      
Debt instrument stated rate       2.625%
Proceeds from issuance of debt $ 222,600      
Common stock, par value (in dollars per share) | $ / shares $ 0.0001      
Conversion ratio 20.9161      
Conversion price | $ / shares $ 47.81      
Threshold consecutive trading days | day   30    
Redemption price percentage   100.00%    
Triggering Event 1 | Senior Notes | Convertible Notes        
Line of Credit Facility [Line Items]        
Threshold trading days | day   20    
Threshold consecutive trading days | day   30    
Threshold percentage of stock price trigger   130.00%    
Triggering Event 2 | Senior Notes | Convertible Notes        
Line of Credit Facility [Line Items]        
Threshold trading days | day   5    
Threshold consecutive trading days | day   5    
Threshold percentage of stock price trigger   98.00%