MARKETABLE SECURITIES

12 Months Ended

Dec. 31, 2016

MARKETABLE SECURITIES

MARKETABLE SECURITIES

(5) MARKETABLE SECURITIES

        A summary of marketable securities is shown below:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
December 31, 2016
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less	$	52,754	$	5	$	(12	)	$	52,747
Maturing after one year through three years		296		8		—			304
Total U.S. government and municipal obligations	$	53,050	$	13	$	(12	)	$	53,051
Corporate debt securities
Maturing in one year or less	$	94,320	$	—	$	(56	)	$	94,264
Maturing after one year through three years		—		—		—			—
Total corporate debt securities	$	94,320	$	—	$	(56	)	$	94,264
Total marketable securities	$	147,370	$	13	$	(68	)	$	147,315
December 31, 2015
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less	$	48,871	$	4	$	(20	)	$	48,855
Maturing after one year through three years		15,940		24		(57	)		15,907
Total U.S. government and municipal obligations	$	64,811	$	28	$	(77	)	$	64,762
Corporate debt securities
Maturing in one year or less	$	129,327	$	2	$	(141	)	$	129,188
Maturing after one year through three years		23,932		1		(102	)		23,831
Total corporate debt securities	$	153,259	$	3	$	(243	)	$	153,019
Total marketable securities	$	218,070	$	31	$	(320	)	$	217,781

        The marketable securities held by the Company were high investment grade and there were no marketable securities that the Company considered to be other-than-temporarily impaired as of December 31, 2016. Marketable securities include $0.6 million and $1.5 million in accrued interest at December 31, 2016 and December 31, 2015, respectively.