Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurements [Abstract]

Fair Value Measurements For Marketable Securities And Foreign Exchange Forward Contracts

			Fair Value Measurements at  March 31, 2013 Using
(In thousands)	Balance   March 31, 2013			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Marketable securities:
U.S. government and agency obligations	$	15,571		$	—	$	15,571	$	—
Corporate debt securities and certificates of deposit		5,727			—		5,727		—
Asset backed securities		629			—		629		—
Equity security		45			45		—		—
Total marketable securities	$	21,972		$	45	$	21,927	$	—
Derivative instruments-liabilities:
Foreign exchange forward contracts	$	8		$	—	$	8	$	—

			Fair Value Measurements at  December 31, 2012 Using
(In thousands)	Balance December 31, 2012			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Marketable securities:
U.S. government and agency obligations	$	16,366		$	—	$	16,366	$	—
Corporate debt securities and certificates of deposit		5,300			—		5,300		—
Asset backed securities		165			—		165		—
Equity security		42			42		—		—
Total marketable securities	$	21,873		$	42	$	21,831	$	—
Derivative instruments-assets:
Foreign exchange forward contracts	$	153		$	—	$	153	$	—