Investment in Kronos Worldwide, Inc. - Selected Financial Information of Kronos Balance Sheet (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 186,011	$ 193,648
Property and equipment, net	29,061	29,182
Other noncurrent assets	2,550	2,753
Total assets	583,408	596,152
Current liabilities	32,026	30,597
Accrued pension costs	2,234	3,722
Other	3,195	3,490
Stockholders' equity	363,167	362,470
Total liabilities and equity	583,408	596,152
Kronos
Schedule Of Equity Method Investments [Line Items]
Current assets	1,256,800	1,258,000
Property and equipment, net	444,700	503,400
Investment in TiO2 joint venture	110,400	101,900
Other noncurrent assets	131,000	149,500
Total assets	1,942,900	2,012,800
Current liabilities	330,200	288,800
Long-term debt	390,900	449,800
Accrued pension costs	245,700	287,400
Other	97,200	116,600
Stockholders' equity	878,900	870,200
Total liabilities and equity	$ 1,942,900	$ 2,012,800