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Investment in Kronos Worldwide, Inc. - Changes in Carrying Value of Investment (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Balance at the beginning of the period     $ 264,803  
Equity in earnings of Kronos Worldwide, Inc. $ 6,416 $ 10,934 37,940 $ 24,718
Dividends received from Kronos     (20,074) $ (19,017)
Equity in Kronos' other comprehensive income (loss):        
Balance at the end of the period 268,335   268,335  
Kronos        
Balance at the beginning of the period     264,800  
Equity in earnings of Kronos Worldwide, Inc.     37,900  
Dividends received from Kronos     (20,100)  
Equity in Kronos' other comprehensive income (loss):        
Currency translation     (16,900)  
Other     600  
Balance at the end of the period $ 268,300   268,300  
Kronos | Defined Benefit Pension Plans        
Equity in Kronos' other comprehensive income (loss):        
Defined benefit pension plans     $ 2,000