MARKETABLE SECURITIES (Tables)

12 Months Ended

Dec. 31, 2012

MARKETABLE SECURITIES

Summary of marketable securities

	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

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