Commitments and Contingencies - Additional Information (Detail) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Estimated remediation liabilities included in accrued liabilities	$ 1,300,000	$ 700,000
Estimated remediation liabilities included in other noncurrent liabilities	3,000,000.0	2,100,000
Accrued liabilities for legal contingencies	$ 0	$ 0

Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

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