Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Income Tax Disclosure [Line Items]
Dividends received from Kronos Worldwide, Inc.	$ 6,692,000	$ 6,339,000
Kronos
Income Tax Disclosure [Line Items]
Dividends received from Kronos Worldwide, Inc.	$ 6,700,000	$ 6,300,000

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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