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Convertible Senior Notes and Capped Call Transactions - Narrative (Details)
12 Months Ended
May 11, 2020
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2021
؋ / shares
Debt Instrument [Line Items]          
Proceeds from issuance of convertible senior notes, net of issuance costs   $ 0 $ 245,308,000 $ 0  
Payments for capped calls   0 $ 29,348,000 $ 0  
Cap price | ؋ / shares         ؋ 47.24
2025 Senior Notes          
Debt Instrument [Line Items]          
Equity component, net of discount and issuance costs   30,794,000      
Fair value of the notes   $ 436,425,000      
Convertible Debt          
Debt Instrument [Line Items]          
Payments for capped calls $ 29,348,000        
Convertible Debt | 2025 Senior Notes          
Debt Instrument [Line Items]          
Principal amount excluding purchasers' option 220,000,000        
Additional amount included in principal from exercised options 33,000,000        
Proceeds from issuance of convertible senior notes, net of issuance costs $ 245,158,000        
Interest rate, stated percentage 1.25%        
Debt instrument, convertible, conversion ratio   32.5668      
Initial conversion price (in dollars per share) | ؋ / shares         ؋ 30.71
Equity component, net of discount and issuance costs   $ 31,779,000      
Debt issuance costs of liability component   $ 6,857,000      
Debt instrument, interest rate, effective percentage   4.51%      
Convertible Debt | 2025 Senior Notes | Additional paid-in capital          
Debt Instrument [Line Items]          
Debt issuance costs of equity component   $ 985,000