Investment in Kronos Worldwide, Inc. - Selected Financial Information of Kronos Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 193,648	$ 171,164
Property and equipment, net	29,182	28,950
Other noncurrent assets	2,753	5,262
Total assets	596,152	548,150
Current liabilities	30,597	27,507
Accrued pension costs	3,722	6,392
Other noncurrent liabilities	3,490	3,780
Stockholders' equity	362,470	311,877
Total liabilities and equity	596,152	548,150
Kronos | Reportable Legal Entities
Schedule Of Equity Method Investments [Line Items]
Current assets	1,258,000	1,218,300
Property and equipment, net	503,400	524,600
Investment in TiO2 joint venture	101,900	103,300
Other noncurrent assets	149,500	190,500
Total assets	2,012,800	2,036,700
Current liabilities	288,800	260,200
Long-term debt	449,800	486,700
Accrued pension costs	287,400	372,600
Other noncurrent liabilities	116,600	120,700
Stockholders' equity	870,200	796,500
Total liabilities and equity	$ 2,012,800	$ 2,036,700