Summary of Significant Accounting Policies - Software Costs (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2023 |
Sep. 30, 2022 |
Sep. 30, 2023 |
Sep. 30, 2022 |
Dec. 31, 2022 |
|
| Accounting Policies [Abstract] | |||||
| Capitalized software | $ 23.6 | $ 23.6 | $ 21.4 | ||
| Accumulated amortization | 26.8 | $ 26.8 | $ 22.6 | ||
| Capitalized software, estimated useful life (in years) | 5 years | ||||
| Software amortization expense | $ 1.4 | $ 1.1 | $ 4.3 | $ 3.2 | |