Investment in Kronos Worldwide, Inc. - Selected Financial Information of Kronos Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule Of Equity Method Investments [Line Items]
Current assets	$ 208,964	$ 193,648
Property and equipment, net	29,459	29,182
Other noncurrent assets	2,645	2,753
Total assets	640,405	596,152
Current liabilities	31,499	30,597
Accrued pension costs	3,116	3,722
Other	3,343	3,490
Stockholders' equity	398,041	362,470
Total liabilities and equity	640,405	596,152
Kronos
Schedule Of Equity Method Investments [Line Items]
Current assets	1,247,900	1,258,000
Property and equipment, net	472,000	503,400
Investment in TiO2 joint venture	106,000	101,900
Other noncurrent assets	137,600	149,500
Total assets	1,963,500	2,012,800
Current liabilities	281,500	288,800
Long-term debt	415,800	449,800
Accrued pension costs	263,600	287,400
Other	99,000	116,600
Stockholders' equity	903,600	870,200
Total liabilities and equity	$ 1,963,500	$ 2,012,800