Marketable Securities

3 Months Ended

Mar. 31, 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)
March 31, 2014
Marketable securities
U.S. government and municipal obligations
Maturing in one year or less	$	40,967	$	32	$	—		$	40,999
Maturing after one year through three years	43,248		84		(23		)	43,309
Total U.S. government and municipal obligations	$	84,215	$	116	$	(23	)	$	84,308
Corporate debt securities
Maturing in one year or less	$	96,375	$	38	$	(29	)	$	96,384
Maturing after one year through three years	36,651		12		(31		)	36,632
Total corporate debt securities	$	133,026	$	50	$	(60	)	$	133,016
Total marketable securities	$	217,241	$	166	$	(83	)	$	217,324
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 March 31, 2014.  Marketable securities include $1.3 million and $0.9 million in accrued interest at March 31, 2014 and December 31, 2013, respectively.