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Related Party Transactions (Tables)
12 Months Ended
Dec. 31, 2021
Related Party Transactions [Abstract]  
Current Receivables and Payables to Affiliates

December 31, 

    

2020

    

2021

(In thousands)

Current receivables from affiliates:

Other - trade items

$

313

$

Current payables to affiliates:

Other - trade items

$

696

$

682

Income taxes payable to Valhi

 

29

 

9

Total

$

725

$

691