Investment in Kronos Worldwide, Inc. - Selected Financial Information of Kronos Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 218,264	$ 193,968
Property and equipment, net	25,863	28,694
Other noncurrent assets	2,060	2,523
Total assets	576,662	609,867
Current liabilities	30,449	32,052
Accrued pension costs	1,571	3,012
Other noncurrent liabilities	5,074	4,279
Stockholders' equity	369,812	382,150
Total liabilities and stockholders' equity	576,662	609,867
Kronos | Reportable Legal Entities
Schedule Of Equity Method Investments [Line Items]
Current assets	1,117,400	1,242,200
Property and equipment, net	482,900	484,500
Investment in TiO2 joint venture	111,000	112,900
Other noncurrent assets	126,700	94,800
Total assets	1,838,000	1,934,400
Current liabilities	370,800	326,700
Long-term debt	440,900	424,100
Accrued pension costs	150,000	128,600
Other noncurrent liabilities	68,000	97,800
Stockholders' equity	808,300	957,200
Total liabilities and stockholders' equity	$ 1,838,000	$ 1,934,400