Financial Instruments and Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Summary of Financial Instruments Not Carried at Fair Value

The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure:

	December 31, 2017				March 31, 2018
	Carrying		Fair		Carrying		Fair
	amount		value		amount		value
	(In thousands)
Cash, cash equivalents and restricted cash	$	102,941	$	102,941	$	104,481	$	104,481
Noncontrolling interest in CompX common stock		17,756		22,224		18,160		23,060