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Long-term Debt - 2024 Notes (Details)
$ / shares in Units, shares in Millions
 1 Months Ended 3 Months Ended 6 Months Ended
Dec. 01, 2021
USD ($)
Aug. 31, 2020
USD ($)
shares
$ / shares
Dec. 31, 2016
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2022
USD ($)
Jan. 01, 2022
USD ($)
Dec. 31, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]                        
Stockholders' equity       $ (613,088,000) $ (614,190,000) $ (613,088,000) $ (614,190,000) $ (611,209,000)   $ (693,633,000) $ (617,298,000) $ (619,600,000)
Amortization of deferred financing costs           1,079,000 8,837,000          
Cumulative Effect, Period of Adoption, Adjustment                        
Debt Instrument [Line Items]                        
Stockholders' equity                   66,383,000    
Common Stock                        
Debt Instrument [Line Items]                        
Stockholders' equity       (916,000) (872,000) (916,000) (872,000) (916,000)   (908,000) (868,000) (859,000)
Additional Paid-In Capital                        
Debt Instrument [Line Items]                        
Stockholders' equity       (1,231,005,000) (1,242,900,000) (1,231,005,000) (1,242,900,000) (1,224,250,000)   (1,340,989,000) (1,236,847,000) (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       596,928,000 608,092,000 596,928,000 608,092,000 $ 592,340,000   626,779,000 $ 598,985,000 $ 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)      
Senior Notes                        
Debt Instrument [Line Items]                        
Payments of debt issuance costs   $ 2,500,000                    
2024 Notes | Senior Notes                        
Debt Instrument [Line Items]                        
Face amount   $ 117,100,000   117,051,000   117,051,000       $ 117,051,000    
Interest rate   3.50%                    
Debt conversion, converted instrument, amount   $ 84,200,000                    
Debt issuance costs   $ 3,000,000                    
Interest expense       1,000,000 1,000,000 2,000,000 2,000,000          
Conversion price (in dollars per share) | $ / shares   $ 18.23                    
Initial conversion amount (in shares) | shares   6.4                    
Long-term debt, net   $ 78,900,000                    
Debt issuance costs, net, debt component   $ 1,700,000                    
Amortization of deferred financing costs       $ 200,000 $ 2,000,000 $ 400,000 $ 3,900,000          
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   130.00%                    
Repurchase covenant, trading days, minimum   20 days                    
Repurchase covenant, consecutive trading days, minimum   30 days                    
Repurchase covenant, repurchase price due to change in sale price as percentage of conversion price   100.00%                    
2024 Notes | Senior Notes | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06                        
Debt Instrument [Line Items]                        
Long-term debt, net                 25,100,000      
2024 Notes | Senior Notes | Common Stock                        
Debt Instrument [Line Items]                        
Debt issuance costs   $ 1,300,000                    
Proceeds from issuance of debt   $ 38,100,000                    
2024 Notes | Senior Notes | Common Stock | Class A Common Stock                        
Debt Instrument [Line Items]                        
Initial conversion rate per $ 1000 principal amount   0.0548667                    
2024 Notes | Senior 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                 38,100,000      
2024 Notes | Senior 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                 (1,300,000)      
2024 Notes | Senior Notes | Retained Earnings (Accumulated Deficit) | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2020-06                        
Debt Instrument [Line Items]                        
Stockholders' equity                 $ 11,700,000      
2021 Notes | Senior Notes                        
Debt Instrument [Line Items]                        
Face amount     $ 125,000,000                  
Interest rate     2.00%                  
Debt conversion, converted instrument, amount $ 26,700,000                      
Debt conversion, original debt, amount 26,300,000 $ 84,200,000                    
Payments of debt issuance costs $ 400,000                      
Debt issuance costs     $ 4,600,000                  
Proceeds from issuance of debt     $ 120,400,000                  
New Notes | Senior Notes                        
Debt Instrument [Line Items]                        
Debt conversion, converted instrument, amount   $ 32,800,000