Commitments and Contingencies (Details) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2021
USD ($)
COMPANY
SUBLEASE
|
Dec. 31, 2020
USD ($)
|
Dec. 31, 2019
USD ($)
|
|
| Loss Contingencies [Line Items] | |||
| Rent expense | $ 6.2 | $ 6.4 | $ 8.8 |
| Future minimum sublease rental payments to be received | $ 3.1 | ||
| Number of non-cancellable sublease agreements | sublease | SUBLEASE | 3 | ||
| Outstanding letters of credit | $ 8.9 | ||
| Accrued estimated contingent legal liabilities | $ 8.3 | ||
| TENNESSEE | |||
| Loss Contingencies [Line Items] | |||
| Number of companies associated with sublease agreements | company | COMPANY | 2 | ||
| CALIFORNIA | |||
| Loss Contingencies [Line Items] | |||
| Number of companies associated with sublease agreements | company | COMPANY | 1 | ||