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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Income Tax [Line Items] |  |  |  |  |
Net deferred income tax assets | $ 45.0 |  | $ 45.0 |  | $ 45.0
Effective tax rate increased | 0.30% | 132.50% |  | 7.10% |
Decrease in effective tax rate |  |  | 0.80% |  |
Income tax rate non deductible legal settlement |  | $ 2.4 |  | $ 2.4 |
Decrease in unrecognized tax positions | $ 1.4 |  | $ 1.4 |  |
Interest and penalties | $ 1.7 |  | $ 1.7 |  |
Florida [Member] |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Increase in tax expense (benefit) |  | $ (0.5) |  | $ (0.5) |
Decrease in effective tax rate due to settlement of a state income tax audit, percentage |  | 28.20% |  | 1.50% |

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