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Long-term Debt - 2025 Notes (Details)
$ / shares in Units, shares in Millions
 1 Months Ended 3 Months Ended 9 Months Ended
Oct. 31, 2018
USD ($)
shares
$ / shares
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Jan. 01, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Oct. 24, 2018
USD ($)
Oct. 22, 2018
USD ($)
Debt Instrument [Line Items]                        
Stockholders' equity   $ (856,138,000) $ (607,484,000) $ (856,138,000) $ (607,484,000) $ (613,088,000)   $ (693,633,000) $ (614,190,000) $ (619,600,000)    
Amortization of deferred financing costs       1,762,000 13,399,000              
Cumulative Effect, Period of Adoption, Adjustment                        
Debt Instrument [Line Items]                        
Stockholders' equity               66,383,000        
Common Stock                        
Debt Instrument [Line Items]                        
Stockholders' equity   (1,012,000) (874,000) (1,012,000) (874,000) (916,000)   (908,000) (872,000) (859,000)    
Additional Paid-In Capital                        
Debt Instrument [Line Items]                        
Stockholders' equity   (1,472,098,000) (1,249,228,000) (1,472,098,000) (1,249,228,000) (1,231,005,000)   (1,340,989,000) (1,242,900,000) (1,229,320,000)    
Additional Paid-In Capital | Cumulative Effect, Period of Adoption, Adjustment                        
Debt Instrument [Line Items]                        
Stockholders' equity               106,172,000        
Additional Paid-In Capital | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06                        
Debt Instrument [Line Items]                        
Stockholders' equity             $ (106,200,000)          
Retained Earnings (Accumulated Deficit)                        
Debt Instrument [Line Items]                        
Stockholders' equity   594,805,000 621,132,000 594,805,000 621,132,000 $ 596,928,000   626,779,000 $ 608,092,000 $ 589,178,000    
Retained Earnings (Accumulated Deficit) | Cumulative Effect, Period of Adoption, Adjustment                        
Debt Instrument [Line Items]                        
Stockholders' equity               (39,789,000)        
Retained Earnings (Accumulated Deficit) | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06                        
Debt Instrument [Line Items]                        
Stockholders' equity             (39,800,000)          
2025 Notes                        
Debt Instrument [Line Items]                        
Debt issuance costs $ 5,900,000                      
Senior Notes | 2025 Notes                        
Debt Instrument [Line Items]                        
Face amount $ 172,500,000 172,500,000   172,500,000       $ 172,500,000     $ 22,500,000 $ 150,000,000
Interest rate 1.50%                      
Interest expense   600,000 1,900,000 600,000 1,900,000              
Conversion price (in dollars per share) | $ / shares $ 33.43                      
Initial conversion amount (in shares) | shares 5.2                      
Carrying amount $ 100,700,000                      
Proceeds from issuance of debt 166,600,000                      
Debt issuance costs $ 3,400,000                      
Amortization of deferred financing costs   $ 400,000 $ 2,500,000 $ 1,000,000 $ 7,400,000              
Repurchase covenant, repurchase price due to fundamental change as percentage of principal amount 100.00%                      
Repurchase covenant, sale price as a percentage of conversion price (at least) 130.00%                      
Repurchase covenant, trading days, minimum 20 days                      
Consecutive trading days, minimum 30 days                      
Repurchase covenant, repurchase price due to change in sale price as percentage of conversion price 100.00%                      
Senior Notes | 2025 Notes | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06                        
Debt Instrument [Line Items]                        
Carrying amount             41,300,000          
Senior Notes | 2025 Notes | Common Stock                        
Debt Instrument [Line Items]                        
Proceeds from issuance of debt $ 71,800,000                      
Debt issuance costs $ 2,500,000                      
Senior Notes | 2025 Notes | Common Stock | Class A Common Stock                        
Debt Instrument [Line Items]                        
Initial conversion rate per $ 1000 principal amount 0.0299135                      
Senior Notes | 2025 Notes | Additional Paid-In Capital | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06 | Equity Component of Long Term Debt                        
Debt Instrument [Line Items]                        
Stockholders' equity             71,800,000          
Senior Notes | 2025 Notes | Additional Paid-In Capital | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06 | Deferred Financing Fees                        
Debt Instrument [Line Items]                        
Stockholders' equity             (2,500,000)          
Senior Notes | 2025 Notes | Retained Earnings (Accumulated Deficit) | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06                        
Debt Instrument [Line Items]                        
Stockholders' equity             $ 28,100,000