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Investment in Kronos Worldwide, Inc. - Changes in Carrying Value of Investment (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Balance at the beginning of the period     $ 264,803  
Equity in earnings of Kronos Worldwide, Inc. $ 13,991 $ 7,816 31,524 $ 13,784
Dividends received from Kronos     (13,384) $ (12,678)
Balance at the end of the period 275,853   275,853  
Kronos        
Balance at the beginning of the period     264,800  
Equity in earnings of Kronos Worldwide, Inc.     31,500  
Dividends received from Kronos     (13,400)  
Currency translation     (9,000)  
Other     600  
Balance at the end of the period $ 275,900   275,900  
Kronos | Defined Benefit Pension Plans        
Defined benefit pension plans     $ 1,400