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Intangible Assets
 12 Months Ended
Dec. 31, 2011
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
Intangible Assets

Intangibles as of December 31, 2011, consist of the following:
 
Gross
 
Accumulated
Amortization
 
Net
 
(In thousands)
Patents and technology rights
$
29,774

 
$
(26,158
)
 
$
3,616

Customer relationships
13,625

 
(8,859
)
 
4,766

Total intangibles
$
43,399

 
$
(35,017
)
 
$
8,382


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



Amortization of identifiable intangible assets was $5.2 million, $5.9 million and $7.0 million in 2011, 2010 and 2009, respectively. Based on the amortizing assets recognized in our balance sheet at December 31, 2011, amortization for each of the next five years is estimated as follows:
 
(In thousands)
2012
$
3,724

2013
3,364

2014
652

2015
350

2016
122

Thereafter
170

Total amortization
$
8,382