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Contingencies - Additional Information (Detail) $ in Millions |  | 5 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 13, 2020 USD ($) | Jul. 31, 2018 Claim | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Loss Contingencies [Line Items] |  |  |  |
Number of arbitration claims filed | Claim |  | 310 |  |
Settlement reserve |  |  | $ 7.1 |
Subsequent Event [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Settlement payment expected within next 45 days | $ 7.1 |  |  |
Other Accrued Expenses [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Accrual for legal fees and settlements |  |  | $ 7.3 | $ 6.1

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