Investment in Kronos Worldwide, Inc. - Selected Financial Information of Kronos Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 208,373	$ 193,968
Property and equipment, net	27,123	28,694
Other noncurrent assets	1,771	2,523
Total assets	586,421	609,867
Current liabilities	29,338	32,052
Accrued pension costs	2,754	3,012
Other noncurrent liabilities	4,176	4,279
Stockholders' equity	367,657	382,150
Total liabilities and equity	586,421	609,867
Kronos
Schedule Of Equity Method Investments [Line Items]
Current assets	1,055,700	1,242,200
Property and equipment, net	489,300	484,500
Investment in TiO2 joint venture	121,200	112,900
Other noncurrent assets	112,600	94,800
Total assets	1,778,800	1,934,400
Current liabilities	260,600	326,700
Long-term debt	432,400	424,100
Accrued pension costs	126,900	128,600
Other noncurrent liabilities	82,400	97,800
Stockholders' equity	876,500	957,200
Total liabilities and equity	$ 1,778,800	$ 1,934,400