Investment in Kronos Worldwide, Inc. - Selected Financial Information of Kronos Balance Sheet (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 206,115	$ 193,968
Property and equipment, net	26,222	28,694
Other noncurrent assets	1,812	2,523
Total assets	570,484	609,867
Current liabilities	30,021	32,052
Accrued pension costs	2,111	3,012
Other noncurrent liabilities	3,984	4,279
Stockholders' equity	364,239	382,150
Total liabilities and equity	570,484	609,867
Kronos
Schedule Of Equity Method Investments [Line Items]
Current assets	999,700	1,242,200
Property and equipment, net	476,700	484,500
Investment in TiO2 joint venture	115,700	112,900
Other noncurrent assets	123,800	94,800
Total assets	1,715,900	1,934,400
Current liabilities	256,200	326,700
Long-term debt	422,500	424,100
Accrued pension costs	122,300	128,600
Other noncurrent liabilities	81,700	97,800
Stockholders' equity	833,200	957,200
Total liabilities and equity	$ 1,715,900	$ 1,934,400