Investment in Kronos Worldwide, Inc. - Selected Financial Information of Kronos Income Statement (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Equity Method Investments [Line Items]
Net sales	$ 161,287	$ 166,562	$ 140,815
Cost of sales	112,068	117,763	98,066
Income (loss) from operations	14,129	13,731	10,491
Income tax expense (benefit)	(7,001)	2,785	7,479
Net income (loss)	(2,308)	33,844	51,188
Kronos | Reportable Legal Entities
Schedule Of Equity Method Investments [Line Items]
Net sales	1,666,500	1,930,200	1,939,400
Cost of sales	1,501,600	1,539,100	1,493,200
Income (loss) from operations	(56,000)	159,600	187,100
Income tax expense (benefit)	(23,800)	29,400	40,500
Net income (loss)	$ (49,100)	$ 104,500	$ 112,900