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Marketable Securities (Tables)
 9 Months Ended
Sep. 30, 2016
Investments Debt And Equity Securities [Abstract]  
Schedule of Marketable Securities

 

 

Fair value

measurement

level

 

Market

value

 

 

Cost basis

 

 

Unrealized

gain (loss)

 

 

 

 

(In thousands)

 

December 31, 2015

 

 

 

 

 

 

 

 

 

 

 

 

 

Valhi common stock

1

 

$

19,260

 

 

$

24,347

 

 

$

(5,087

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

September 30, 2016

 

 

 

 

 

 

 

 

 

 

 

 

 

Valhi common stock

1

 

$

33,058

 

 

$

24,347

 

 

$

8,711