Marketable Securities

12 Months Ended

Dec. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

6. Marketable Securities

We report our investments in marketable securities as current assets in our Consolidated Balance Sheets in “Marketable securities,” representing the investment of cash available for current operations. See Note 8.

Our investments in marketable securities are classified as available for sale and are summarized as follows:

	December 31, 2016
	Amortized Cost		Unrealized Gain (Loss)		Market Value
	(In thousands)
Mortgage-backed securities	$	35	$	—	$	35

	December 31, 2015
	Amortized Cost		Unrealized Gain (Loss)			Market Value
	(In thousands)
Corporate bonds	$	16,480	$	(5,042	)	$	11,438
Mortgage-backed securities		77		3			80
Total	$	16,557	$	(5,039	)	$	11,518

Proceeds from maturities and sales of marketable securities and gross realized gains and losses are summarized as follows:

	Year Ended December 31,
	2016		2015		2014
	(In thousands)
Proceeds from maturities	$	—	$	—	$	8,000,000
Proceeds from sales		4,614		51		57

During 2016, we sold an investment in corporate bonds for proceeds of $4.6 million and recognized a loss of $12.9 million. Gross realized gains and losses from the sale of mortgage-backed securities for each of the three years ended December 31, 2016, 2015 and 2014 were not significant.