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Related party transactions (Tables)
12 Months Ended
Dec. 31, 2025
Related party transactions  
Schedule of Current Payables to Affiliates

December 31, 

  ​ ​ ​

2024

  ​ ​ ​

2025

(In thousands)

Current payables to affiliates:

Other payables to affiliates

$

513

$

543

Income taxes payable to Valhi

193

248

$

706

$

791