Intangible Assets

12 Months Ended

Dec. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

11. Intangibles

Intangibles as of December 31, 2013, consist of the following:

	Gross		Accumulated Amortization			Net
	(In thousands)
Patents and technology rights	$	21,929	$	(18,740	)	$	3,189
Customer relationships	8,000		(8,000		)	—
Total intangibles	$	29,929	$	(26,740	)	$	3,189

Intangibles as of December 31, 2012, consist of the following:

	Gross		Accumulated Amortization			Net
	(In thousands)
Patents and technology rights	$	22,169	$	(19,636	)	$	2,533
Customer relationships	8,000		(5,767		)	2,233
Total intangibles	$	30,169	$	(25,403	)	$	4,766

Amortization of identifiable intangible assets was $3.6 million, $3.9 million and $5.2 million in 2013, 2012 and 2011, respectively. Based on the amortizing assets recognized in our balance sheet at December 31, 2013, amortization for each of the next five years is estimated as follows:

	Amortization
	(In thousands)
2014	$	1,028
2015	736
2016	521
2017	488
2018	275
Thereafter	141
Total amortization	$	3,189