Income Taxes - Components of Net Deferred Tax Liability (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Components of Deferred Tax Assets and Liabilities [Abstract]
Inventories	$ 400	$ 500
Accrued OPEB costs	200	200
Accrued pension costs	400	500
Accrued employee benefits	1,300	1,300
Accrued environmental liabilities	24,300	26,700
Other accrued liabilities and deductible differences	200	200
Adjusted gross deferred tax assets (liabilities)	26,800	29,400
Netting of items by tax jurisdiction	(26,800)	(29,400)
Marketable securities	(5,300)	(7,000)
Property and equipment	(2,000)	(2,700)
Goodwill	(1,700)	(1,700)
Other taxable differences	(2,400)	(2,300)
Investment in Kronos Worldwide, Inc.	(65,500)	(59,800)
Adjusted gross deferred tax assets (liabilities)	(76,900)	(73,500)
Net noncurrent deferred tax liability	(50,100)	(44,100)
Netting of items by tax jurisdiction	26,800	29,400
Net noncurrent deferred tax liability	$ (50,119)	$ (44,056)