MARKETABLE SECURITIES (Tables)

12 Months Ended

Dec. 31, 2013

MARKETABLE SECURITIES

Summary of marketable securities

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
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

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
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