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Contingencies - Additional Information (Detail) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) Site unit_Lawsuit | Sep. 30, 2020 USD ($) Site unit_Lawsuit | Dec. 31, 2019 USD ($)
Site Contingency [Line Items] |  |  |
Number of non-owned sites Company is named Potentially Responsible Party | Site | 13 | 13 |
Number of non-owned sites the Company is identified as a de minimis party | Site | 12 | 12 |
Number of non-owned sites company is in agreement on amount of de minimis settlement | Site | 8 | 8 |
Number of non-owned sites company is continuing to investigate | Site | 4 | 4 |
Total environmental reserves | $ 30.3 | $ 30.3 | $ 28.9
Payments for environmental matters |  | (4.5) |
Foreign currency translation gain (loss) |  | $ (0.1) |
Litigation settlement amount awarded to other party | $ 6.8 |  |
Number of class action lawsuits | unit_Lawsuit | 2 | 2 |
HCC Industries |  |  |
Site Contingency [Line Items] |  |  |
Environmental expense |  | $ 6.0 |
Reserves related to an owned site acquired | $ 7.8 | $ 7.8 | $ 9.0

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