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Debt - Convertible Senior Notes (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Aug. 07, 2017
USD ($)
$ / shares
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Mar. 31, 2022
USD ($)
$ / shares
$ / Item
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Aug. 01, 2017
$ / shares
Jan. 31, 2013
USD ($)
Debt                  
Payment upon maturity of debt instrument         $ 0 $ 96,204      
Debt discount and issuance costs, net   $ (5,685)     (5,685)   $ (7,266)    
Total debt, net   447,815     447,815   446,234    
Less: Current portion of long-term debt, net   $ 191,843     $ 191,843   0    
2025 Notes                  
Debt                  
Common stock price to current conversion price ratio         130.00%        
Average trading price percentage         98.00%        
2025 Notes | Common stock                  
Debt                  
Share Price | $ / shares               $ 13.28  
2028 Notes                  
Debt                  
Debt instrument, covenant terms description         The indenture governing the 2028 Notes contains customary terms and covenants, including a merger covenant and that upon certain events of default occurring and continuing, either the Trustee or the holders of at least 25% of the aggregate principal amount of the outstanding Notes may declare 100% of the principal of, and accrued and unpaid interest, if any, on, all the Notes to be due and payable immediately.        
Convertible senior notes | 2025 Notes                  
Debt                  
Ratio of repurchase price to the principal amount         100.00%        
Effective interest rate   2.88%     2.88%        
Principal   $ 192,500     $ 192,500   192,500    
Debt discount and issuance costs, net   (657)     (657)   (1,205)    
Net carrying amount             191,295    
Net carrying amount   191,843     191,843        
Interest expense                  
Contractual interest expense   1,203 $ 1,203   3,609 3,609      
Amortization of debt issuance costs   184 179   548 532      
Total interest and amortization expense   $ 1,387 1,382   $ 4,157 4,141      
Convertible senior notes | 2025 Notes | Over-Allotment Option                  
Debt                  
Loan amount $ 17,500                
Portion of debt instrument face amount, Exercised 17,500                
Convertible senior notes | 2025 Notes | Private Placement                  
Debt                  
Loan amount $ 192,500                
Debt Instrument, annual interest rate 2.50%                
Convertible senior notes | 2025 Notes | Common stock                  
Debt                  
Conversion rate for shares of common stock per $1,000 principal 57.924                
Conversion price (dollars per share) | $ / shares $ 17.26                
Debt instrument maturity date Aug. 15, 2025                
Conversion premium (as a percent) 30.00%                
Convertible senior notes | 2028 Notes                  
Debt                  
Loan amount       $ 261,000          
Debt instrument maturity date       Mar. 15, 2028          
Proceeds from issuance of convertible notes, net of issuance costs       $ 252,600          
Common stock price to current conversion price ratio       130.00%          
Average trading price percentage       98.00%          
Ratio of repurchase price to the principal amount       100.00%          
Effective interest rate   2.70%     2.70%        
Principal   $ 261,000     $ 261,000   261,000    
Debt discount and issuance costs, net   (5,028)     (5,028)   (6,061)    
Net carrying amount   255,972     255,972   $ 254,939    
Interest expense                  
Contractual interest expense   1,387 1,387   4,160 4,160      
Amortization of debt issuance costs   349 340   1,033 1,006      
Total interest and amortization expense   $ 1,736 $ 1,727   $ 5,193 $ 5,166      
Convertible senior notes | 2028 Notes | Privately-negotiated capped call option                  
Debt                  
Cap price for the underlying number of shares (in dollars per share) | $ / Item       33.985          
Purchases of capped calls in connection with convertible senior notes due 2028       $ 21,000          
Convertible senior notes | 2028 Notes | Over-Allotment Option                  
Debt                  
Loan amount       45,000          
Portion of debt instrument face amount, Exercised       $ 36,000          
Convertible senior notes | 2028 Notes | Private Placement                  
Debt                  
Debt Instrument, annual interest rate       2.125%          
Convertible senior notes | 2028 Notes | Common stock                  
Debt                  
Conversion rate for shares of common stock per $1,000 principal       38.1432          
Conversion price (dollars per share) | $ / shares       $ 26.22          
Convertible subordinated notes | 2023 Notes                  
Debt                  
Loan amount                 $ 287,500
Debt Instrument, Repurchased Face Amount       $ 144,800          
Payment upon maturity of debt instrument       $ 165,600