Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2014

Investments Debt And Equity Securities [Abstract]

Schedule of Marketable Securities

	Fair value measurement level	Market value		Cost basis		Unrealized gain
		(In thousands)
December 31, 2013
Valhi common stock	1	$	252,677	$	24,347	$	228,330
September 30, 2014
Valhi common stock	1	$	93,855	$	24,347	$	69,508