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Fair Value - Additional Information (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 29, 2020 | Nov. 30, 2019 | Sep. 30, 2019 | Dec. 31, 2019 | Sep. 30, 2020
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |
Fair value credit agreement |  |  |  | $ 65.3 | $ 57.8
Payment for contingent consideration | $ 0.3 | $ 2.7 |  |  |
Contingent Consideration |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |
Level 3 liability for contingent consideration |  |  | $ 3.0 | $ 3.0 |

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