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Marketable Securities - Additional Information (Detail) - Common stock - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021
NL And CompX |  |  |
Marketable Securities [Line Items] |  |  |
Sale of NL and CompX common stock | $ 0.1 |  |
Valhi Inc |  |  |
Marketable Securities [Line Items] |  |  |
Investments in publicly-traded shares |  |  | 144,000
Quoted market price of per share |  | $ 22.00 | $ 28.75

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