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Stock-Based Compensation Expense and Employee Benefit Plans - Employee Stock Purchase Plan (Details) - 2018 ESPP - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee stock ownership plan (ESOP), compensation expense $ 11.2 $ 4.5  
Number of shares issued (in shares) 759,744 1,945,305  
Number of additional shares authorized (in shares) 12,055,792 1,902,572  
Number of common stock reserved for issuance (in shares) 13,840,716 2,544,668  
Unrecognized stock-based compensation cost $ 10.4   $ 9.8
Expense expected to be recognized over a weighted-average period 1 year 1 month 6 days   6 months