Goodwill And Other Intangible Asset Data (Tables)

12 Months Ended

Dec. 31, 2011

Dec. 31, 2010

Goodwill And Other Intangible Asset Data [Abstract]

Amortized Intangible Assets

	As of December 31, 2010
	Gross Amount		Accumulated Amortization		Net Amount
Amortized intangible assets
Current technology	$	12,718	$	(10,863)	$	1,855
Patent and patent rights		17,160		(9,351)		7,809
Customer relationships		1,773		(1,682)		91
Total	$	31,651	$	(21,896)	$	9,755
Amortization expense for the year ended December 31, 2010			$	3,211

	As of December 31, 2011
	Gross Amount		Accumulated Amortization			Net Amount
Amortized intangible assets
Current technology	$	12,718	$	(11,403	)	$	1,315
Patent and patent rights		23,392		(12,079	)		11,313
Customer relationships		1,773		(1,734	)		39
Total	$	37,883	$	(25,216	)	$	12,667
Amortization expense for the year ended December 31, 2011			$	3,320

Estimated Amortization Expense

Estimated amortization expense:
For the year ended December 31, 2012		3,593
For the year ended December 31, 2013		2,662
For the year ended December 31, 2014		2,413
For the year ended December 31, 2015		1,950
For the year ended December 31, 2016		1,511
Thereafter		538
Total	$	12,667

Schedule Of Intangible Assets Including Goodwill

	As of December 31,
	2011		2010
Unamortized intangible assets
Goodwill at gross cost	$	180,731	$	180,731
Impairment charges		(101,028)		(101,028)
Goodwill	$	79,703	$	79,703