Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Intangible Assets [Abstract]

Schedule Of Intangible Assets

	March 31, 2013						December 31, 2012
(In thousands)	Gross Carrying Amount		Accumulated Amortization		Net		Gross Carrying Amount		Accumulated Amortization		Net
Patents	$	2,866	$	(2,692)	$	174	$	2,847	$	(2,658)	$	189

Schedule Of Amortization Expense For Intangible Assets

	Three Months Ended March 31,
(In thousands)	2013		2012
Patents	$	34	$	41