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Debt - Narrative (Details)
 1 Months Ended 12 Months Ended
Jan. 01, 2021
USD ($)
Sep. 30, 2019
USD ($)
D
$ / shares
Aug. 31, 2015
USD ($)
D
$ / shares
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Long-term debt            
Long-term debt       $ 281,894,000 $ 309,145,000  
Current portion of long-term debt       149,540,000    
Additional paid-in capital       2,123,606,000 2,171,746,000  
Equity component of convertible notes, net           $ 119,482,000
1.50% Convertible senior notes due 2026            
Long-term debt            
Term of the convertible notes   7 years        
Net deferred tax liability in connection with convertible notes       25,300,000    
3.00% Convertible senior notes due 2022            
Long-term debt            
Term of the convertible notes     7 years      
Equity component of convertible notes, net     $ 57,500,000      
Net deferred tax liability in connection with convertible notes     22,300,000      
Convertible debt | 1.50% Convertible senior notes due 2026            
Long-term debt            
Net carrying amount       281,894,000 177,377,000  
Debt principal amount   $ 287,500,000   $ 287,500,000 287,500,000  
Debt instrument additional amount available for repurchase   $ 37,500,000        
Interest rate ( as a percent )   1.50%        
Net proceeds from issuance of convertible notes   $ 279,300,000        
Trading days, number | D   20        
Consecutive trading days, period | D   30        
Stock price trigger   130.00%        
Business days, period   5 days        
Consecutive trading-day period   5 days        
Maximum product of the closing sale price of shares of the Company's common stock and the applicable conversion rate for such trading day   98.00%        
Conversion ratio   19.0404        
Conversion price per share (in dollars per share) | $ / shares   $ 52.52        
Convertible instruments principal and unpaid interest payable upon events of default   100.00%        
Minimum percentage of principal held by convertible debt instrument holders required to issue notice for declaration of principal and unpaid interest payable upon events of default   25.00%        
Term of the convertible notes 7 years 7 years   4 years 8 months 12 days    
Equity component of convertible notes, net   $ 123,000,000.0        
Amortization of debt discount         13,285,000  
Debt discount to be amortized $ 0       106,065,000  
Convertible debt | 1.50% Convertible senior notes due 2026 | Redemption on or after September 20, 2023            
Long-term debt            
Trading days, number | D   19        
Consecutive trading days, period | D   30        
Stock price trigger   130.00%        
Redemption price as percent of principal amount   100.00%        
Sinking fund   $ 0        
Convertible debt | 3.00% Convertible senior notes due 2022            
Long-term debt            
Net carrying amount       $ 149,540,000 131,763,000  
Debt principal amount     $ 150,000,000.0 $ 150,000,000 150,000,000  
Interest rate ( as a percent )     3.00%      
Net proceeds from issuance of convertible notes     $ 145,400,000      
Trading days, number | D     20      
Consecutive trading days, period | D     30      
Stock price trigger     130.00%      
Business days, period     5 days      
Consecutive trading-day period     5 days      
Maximum product of the closing sale price of shares of the Company's common stock and the applicable conversion rate for such trading day     98.00%      
Conversion ratio     17.7487      
Conversion price per share (in dollars per share) | $ / shares     $ 56.34      
Convertible instruments principal and unpaid interest payable upon events of default     100.00%      
Minimum percentage of principal held by convertible debt instrument holders required to issue notice for declaration of principal and unpaid interest payable upon events of default     25.00%      
Term of the convertible notes 7 years          
Amortization of debt discount         9,314,000  
Debt discount to be amortized $ 0       17,372,000  
Remaining contractual life of the convertible notes       7 months 6 days    
Convertible debt | 3.00% Convertible senior notes due 2022 | Redemption on or after August 20, 2018            
Long-term debt            
Trading days, number | D     19      
Consecutive trading days, period | D     30      
Stock price trigger     130.00%      
Redemption price as percent of principal amount     100.00%      
Sinking fund       $ 0    
Convertible debt instruments redeemed       $ 0    
Cumulative Effect Adjustment            
Long-term debt            
Long-term debt         $ 120,400,000  
Cumulative Effect Adjustment | 1.50% Convertible senior notes due 2026            
Long-term debt            
Additional paid-in capital (123,000,000.0)          
Amortization of debt discount 16,100,000          
Cumulative Effect Adjustment | 3.00% Convertible senior notes due 2022            
Long-term debt            
Additional paid-in capital (57,500,000)          
Amortization of debt discount $ 38,700,000