Investment in Kronos Worldwide, Inc. - Selected Financial Information of Kronos Balance Sheet (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 198,639	$ 193,968
Property and equipment, net	27,914	28,694
Other noncurrent assets	2,891	2,523
Total assets	593,971	609,867
Current liabilities	26,720	32,052
Accrued pension costs	3,063	3,012
Other	4,205	4,279
Stockholders' equity	370,294	382,150
Total liabilities and equity	593,971	609,867
Kronos
Schedule Of Equity Method Investments [Line Items]
Current assets	1,135,100	1,242,200
Property and equipment, net	489,900	484,500
Investment in TiO2 joint venture	113,600	112,900
Other noncurrent assets	92,900	94,800
Total assets	1,831,500	1,934,400
Current liabilities	259,700	326,700
Long-term debt	433,500	424,100
Accrued pension costs	129,300	128,600
Other	96,900	97,800
Stockholders' equity	912,100	957,200
Total liabilities and equity	$ 1,831,500	$ 1,934,400