Marketable Securities

9 Months Ended

Sep. 30, 2012

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)
September 30, 2012
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less	$	12,338	$	28	$	2	$	12,364
Maturing after one year through three years	17,297		114		1		17,410
Total U.S. government and municipal obligations	$	29,635	$	142	$	3	$	29,774
Corporate debt securities
Maturing in one year or less	$	17,817	$	39	$	3	$	17,853
Maturing after one year through three years	6,790		13		2		6,801
Total corporate debt securities	$	24,607	$	52	$	5	$	24,654
Total marketable securities	$	54,242	$	194	$	8	$	54,428
December 31, 2011
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less	$	19,993	$	20	$	—	$	20,013
Maturing after one year through three years	10,808		122		6		10,924
Total U.S. government and municipal obligations	$	30,801	$	142	$	6	$	30,937
Corporate debt securities
Maturing in one year or less	$	5,817	$	3	$	4	$	5,816
Maturing after one year through three years	4,730		2		72		4,660
Total corporate debt securities	$	10,547	$	5	$	76	$	10,476
Total marketable securities	$	41,348	$	147	$	82	$	41,413

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, 2012.