v3.22.2.2
Convertible Senior Notes, Net (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
Dec. 31, 2018
USD ($)
Mar. 31, 2017
offering
Sep. 30, 2022
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
Dec. 31, 2017
USD ($)
Jun. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]                          
Proceeds from issuance of senior secured notes         $ 0 $ 500,000,000              
Stockholders' equity attributable to parent $ 2,407,685,000 $ 2,306,442,000     2,407,685,000 2,306,442,000   $ 2,273,312,000 $ 2,251,018,000 $ 2,294,626,000 $ 2,294,608,000 $ 2,275,753,000 $ 2,270,529,000
Adjustment due to Adoption of ASU                          
Debt Instrument [Line Items]                          
Stockholders' equity attributable to parent $ (3,400,000)       $ (3,400,000)         (3,416,000)      
Common Stock                          
Debt Instrument [Line Items]                          
Share price (in dollars per share) | $ / shares $ 8.30       $ 8.30                
Stockholders' equity attributable to parent $ 1,406,000 1,399,000     $ 1,406,000 1,399,000   1,406,000 1,405,000 1,399,000 1,399,000 1,398,000 1,393,000
Additional Paid-In-Capital                          
Debt Instrument [Line Items]                          
Stockholders' equity attributable to parent 2,712,390,000 2,716,617,000     2,712,390,000 2,716,617,000   2,707,872,000 2,703,354,000 2,721,042,000 2,712,212,000 2,707,855,000 2,707,792,000
Additional Paid-In-Capital | Adjustment due to Adoption of ASU                          
Debt Instrument [Line Items]                          
Stockholders' equity attributable to parent                   (15,408,000)      
Accumulated Deficit                          
Debt Instrument [Line Items]                          
Stockholders' equity attributable to parent (306,179,000) (411,642,000)     (306,179,000) (411,642,000)   $ (436,034,000) $ (453,809,000) (427,883,000) $ (419,071,000) $ (433,568,000) $ (438,724,000)
Accumulated Deficit | Adjustment due to Adoption of ASU                          
Debt Instrument [Line Items]                          
Stockholders' equity attributable to parent                   11,992,000      
Convertible Debt                          
Debt Instrument [Line Items]                          
Debt instrument, face amount 230,000,000       230,000,000         575,000,000      
Interest expense 5,500,000 7,200,000     19,800,000 21,600,000              
Non-cash interest expense 600,000 $ 1,600,000     2,100,000 $ 4,700,000              
Convertible Debt | 2022 Notes                          
Debt Instrument [Line Items]                          
Number of debt offerings issued | offering       2                  
Debt instrument, face amount                   $ 345,000,000      
Stated interest rate                   4.75%      
Proceeds from issuance of senior secured notes             $ 337,500,000            
Convertible Debt | 2022 Notes | Additional Paid-In-Capital                          
Debt Instrument [Line Items]                          
Convertible debt, carrying amount of equity component                   $ 11,000,000      
Convertible Debt | 2023 Notes                          
Debt Instrument [Line Items]                          
Debt instrument, face amount $ 230,000,000   $ 230,000,000   $ 230,000,000         $ 230,000,000      
Stated interest rate 5.38%   5.375%   5.38%         5.38%      
Proceeds from issuance of senior secured notes     $ 223,700,000                    
Convertible senior notes, net $ 229,200,000       $ 229,200,000                
Unamortized discount $ 800,000       $ 800,000                
Convertible Debt | 2023 Notes | Additional Paid-In-Capital                          
Debt Instrument [Line Items]                          
Convertible debt, carrying amount of equity component                   $ 4,400,000      
Convertible Debt | 2022 and 2023 Notes | Additional Paid-In-Capital                          
Debt Instrument [Line Items]                          
Convertible debt, carrying amount of equity component                   $ 15,400,000