Marketable Securities

9 Months Ended

Sep. 30, 2013

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, 2013
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less	$	50,900	$	32	$	(3	)	$	50,929
Maturing after one year through three years	14,104		63		(2		)	14,165
Total U.S. government and municipal obligations	$	65,004	$	95	$	(5	)	$	65,094
Corporate debt securities
Maturing in one year or less	$	36,001	$	13	$	(4	)	$	36,010
Maturing after one year through three years	20,857		9		(8		)	20,858
Total corporate debt securities	$	56,858	$	22	$	(12	)	$	56,868
Total marketable securities	$	121,862	$	117	$	(17	)	$	121,962
December 31, 2012
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less	$	15,566	$	28	$	—		$	15,594
Maturing after one year through three years	19,797		99		(1		)	19,895
Total U.S. government and municipal obligations	$	35,363	$	127	$	(1	)	$	35,489
Corporate debt securities
Maturing in one year or less	$	17,353	$	23	$	(4	)	$	17,372
Maturing after one year through three years	6,193		14		(3		)	6,204
Total corporate debt securities	$	23,546	$	37	$	(7	)	$	23,576
Total marketable securities	$	58,909	$	164	$	(8	)	$	59,065

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, 2013.