Marketable Securities

6 Months Ended

Jun. 30, 2014

Marketable Securities

Marketable Securities

(6)  Marketable Securities

A summary of marketable securities is shown below:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
June 30, 2014
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less	$	46,138	$	59	$	—		$	46,197
Maturing after one year through three years	39,447		89		(11		)	39,525
Total U.S. government and municipal obligations	$	85,585	$	148	$	(11	)	$	85,722
Corporate debt securities
Maturing in one year or less	$	96,350	$	39	$	(11	)	$	96,378
Maturing after one year through three years	29,474		11		(13		)	29,472
Total corporate debt securities	$	125,824	$	50	$	(24	)	$	125,850
Total marketable securities	$	211,409	$	198	$	(35	)	$	211,572
December 31, 2013
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less	$	55,531	$	27	$	(4	)	$	55,554
Maturing after one year through three years	18,234		56		(4		)	18,286
Total U.S. government and municipal obligations	$	73,765	$	83	$	(8	)	$	73,840
Corporate debt securities
Maturing in one year or less	$	38,973	$	9	$	(9	)	$	38,973
Maturing after one year through three years	20,761		12		(5		)	20,768
Total corporate debt securities	$	59,734	$	21	$	(14	)	$	59,741
Total marketable securities	$	133,499	$	104	$	(22	)	$	133,581

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 June 30, 2014. Marketable securities include $1.7 million and $0.9 million in accrued interest at June 30, 2014 and December 31, 2013, respectively.