Investment in Kronos Worldwide, Inc. - Selected Financial Information of Kronos Income Statement (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items]
Net sales	$ 140,815	$ 114,537	$ 124,243
Cost of sales	98,066	81,689	85,280
Income from operations	10,491	2,357	(1,609)
Income tax expense	7,479	(2,515)	579
Net income	51,188	14,680	25,844
Kronos | Reportable Legal Entities
Schedule Of Equity Method Investments [Line Items]
Net sales	1,939,400	1,638,800	1,731,100
Cost of sales	1,493,200	1,287,600	1,344,900
Income from operations	187,100	116,200	145,800
Income tax expense	40,500	16,100	34,000
Net income	$ 112,900	$ 63,900	$ 87,100