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Unsecured Convertible Senior Notes - 2026 Unsecured Convertible Senior Notes (Details)
$ / shares in Units, shares in Millions
2 Months Ended 12 Months Ended
Sep. 30, 2020
USD ($)
D
$ / shares
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2022
USD ($)
shares
Debt Instrument [Line Items]      
Effective interest rate to determine fair value of liability component (as a percent)     9.40%
2026 Notes principal amount issued   $ 225,030,000  
Repurchase of 2023 Notes   (125,638,000)  
Termination of the 2023 Capped Call contracts related to debt repurchased   7,549,000  
Issuance costs   $ 6,785,000  
2026 Unsecured Convertible Senior Notes      
Debt Instrument [Line Items]      
Principal amount $ 225,000,000.0    
Proceeds from 2026 debt issuance used to repurchase 2023 Notes $ 125,600,000    
Interest rate (as a percent) 5.25%    
Unamortized debt issuance costs     $ 4,100,000
Effective interest rate to determine fair value of liability component (as a percent)     5.90%
Conversion rate 0.0540906    
Value used in calculation of conversion rate $ 1,000    
Conversion price | $ / shares $ 18.4875    
Shares upon conversion | shares 12.2    
2026 Notes principal amount issued $ 225,000,000.0    
Issuance costs $ 6,800,000    
Capped Call Transactions, Threshold Trading Day Period 50 days    
Number of shares outstanding on the 2026 Capped Call | shares     12.2
Fair value of equity component $ 23,200,000    
2026 Unsecured Convertible Senior Notes | Debt Conversion, After September 30, 2020      
Debt Instrument [Line Items]      
Stock price trigger (as a percent) 130.00%    
Trading days, number | D 20    
Consecutive trading days, period | D 30    
Consecutive 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 (as a percent) 98.00%    
2026 Unsecured Convertible Senior Notes | Debt Conversion, On Or After August 15, 2023      
Debt Instrument [Line Items]      
Stock price trigger (as a percent) 130.00%    
Trading days, number | D 20    
Consecutive trading days, period | D 30    
2026 Unsecured Convertible Senior Notes | Minimum      
Debt Instrument [Line Items]      
Conversion price | $ / shares $ 18.49    
2026 Unsecured Convertible Senior Notes | Maximum      
Debt Instrument [Line Items]      
Conversion price | $ / shares $ 26.10