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Revenue - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Jun. 30, 2020
Revenue and Concentration Risk [Line Items] |  |  |  |  |
Advance Medicare payments to provide relief from economic impacts of COVID-19 |  |  |  |  | $ 29,700,000
Revenue (decrease) increase due to changes in estimated transaction price due to contractual adjustments | $ (5,300,000) |  | $ 20,100,000 |  |
Capitalized costs incurred to obtain or fulfill contract | $ 0 |  | $ 0 |  |
Performance obligation estimate |  |  |  |  |
Revenue and Concentration Risk [Line Items] |  |  |  |  |
Change in earnings per share (dollars per share) | $ (0.05) |  | $ 0.19 |  |
Government contracts concentration risk | Medicare | Revenues |  |  |  |  |
Revenue and Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (percent) | 15.00% | 17.00% | 14.00% | 17.00% |

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