Maximum lending capacity under the terms noted per the related party credit facility.

No definition available.

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- Definition

Loans receivable principal due on demand effective date.

+ References

No definition available.

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- Definition

Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due after 1 year (or 1 business cycle).

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- Definition

Amount of interest income earned from interest-bearing assets owed to the entity by related party.

+ References

No definition available.

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- Definition

Percentage added to reference rate used to compute variable rate on loan receivable.

+ References

No definition available.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Related Party Transactions - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Note receivable from affiliate	$ 13,200,000	$ 18,700,000
Contran Corporation [Member] \| Intercorporate Services Agreements Fees
Related Party Transaction [Line Items]
Related party transaction expense	3,400,000	3,400,000	$ 3,400,000
Tall Pines Insurance Company or EWI RE Inc
Related Party Transaction [Line Items]
Related party transaction expense	3,300,000	2,900,000	2,800,000
Tall Pines Insurance Company or EWI RE Inc \| Policies Written by Tall Pines Insurance Company
Related Party Transaction [Line Items]
Related party transaction expense	1,000,000.0	900,000	700,000
Unsecured Revolving Demand Promissory \| Valhi Inc
Related Party Transaction [Line Items]
Maximum loan amount				$ 25,000,000
Interest rate on loans repayment				1.00%
Principal due on demand effective date				Dec. 31, 2024
Note receivable from affiliate	13,200,000	18,700,000
Interest income including unused commitment fees on our loan	$ 1,000,000.0	$ 1,200,000	$ 1,500,000