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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Aug. 31, 2016	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Related Party Transaction [Line Items]
Note receivable from affiliate		$ 18,100		$ 18,700
Unsecured Revolving Demand Promissory | Valhi Inc
Related Party Transaction [Line Items]
Maximum loan amount	$ 30,000
Interest rate on loans repayment	1.00%
Principal due on demand effective date	Dec. 31, 2023
Note receivable from affiliate		18,100
Interest income including unused commitment fees on our loan		$ 200	$ 300

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

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Loans receivable principal due on demand effective date.

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

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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.

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