Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2014

Investments Debt And Equity Securities [Abstract]

Schedule of Marketable Securities

	Fair value
	measurement	Market		Cost		Unrealized
	level	value		basis		gain (loss)
		(In thousands)
December 31, 2013
Noncurrent assets
Valhi common stock	1	$	252,677	$	24,347	$	228,330
December 31, 2014
Noncurrent assets
Valhi common stock	1	$	92,131	$	24,347	$	67,784