Marketable Securities

9 Months Ended

Sep. 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)
September 30, 2014
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less	$	40,198	$	43	$	(5	)	$	40,236
Maturing after one year through three years	30,293		67		(9		)	30,351
Total U.S. government and municipal obligations	$	70,491	$	110	$	(14	)	$	70,587
Corporate debt securities
Maturing in one year or less	$	92,510	$	20	$	(34	)	$	92,496
Maturing after one year through three years	28,510		2		(42		)	28,470
Total corporate debt securities	$	121,020	$	22	$	(76	)	$	120,966
Total marketable securities	$	191,511	$	132	$	(90	)	$	191,553
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 September 30, 2014. Marketable securities include $1.2 million and $0.9 million in accrued interest at September 30, 2014 and December 31, 2013, respectively.