Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2011

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of acquired intangibles

Acquired intangibles as of September 30, 2011, consist of the following:

	Gross		Accumulated Amortization			Net
	(In thousands)
Patents and technology rights	$	35,581	$	(31,680	)	$	3,901
Customer relationships	16,940		(11,116		)	5,824
Total intangibles	$	52,521	$	(42,796	)	$	9,725

Acquired intangibles as of December 31, 2010, consist of the following:

	Gross		Accumulated Amortization			Net
	(In thousands)
Patents and technology rights	$	52,587	$	(47,864	)	$	4,723
Customer relationships	16,940		(8,139		)	8,801
Total intangibles	$	69,527	$	(56,003	)	$	13,524

Estimated future amortization of intangible assets

Based on the amortizing assets recognized in our balance sheet at September 30, 2011, amortization for each of the next five years is estimated as follows:

	(In thousands)
2011 Remaining	$	1,165
2012	3,729
2013	3,479
2014	727
2015	346
Thereafter	279
Total amortization	$	9,725