Intangible Assets

9 Months Ended

Sep. 30, 2012

Intangible Assets [Abstract]

Intangible Assets

(5)  Intangible Assets

Intangible assets other than goodwill at September 30, 2012 and December 31, 2011 were as follows:

	2012							2011
(in thousands)	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Intangible assets with finite lives:
Licenses	$	5,875	$	(5,875	)	$	—	$	5,875	$	(5,875	)	$	—
Patent costs		20,091		(13,989	)		6,102		16,379		(13,846	)		2,533
Acquired technology		26,234		(11,437	)		14,797		11,015		(10,345	)		670
Internally developed software		17,847		(11,064	)		6,783		17,847		(9,983	)		7,864
Customer relationships		56,865		(6,171	)		50,694		32,974		(1,798	)		31,176
Non-compete agreements		11,717		(3,280	)		8,437		8,976		(1,890	)		7,086
Trade names		4,362		(574	)		3,788		1,951		(180	)		1,771
Other		6,355		(2,824	)		3,531		1,986		(1,746	)		240
Intangibles with indefinite lives:
Trademarks		2,770		—			2,770		2,700		—			2,700
Total intangible assets	$	152,116	$	(55,214	)	$	96,902	$	99,703	$	(45,663	)	$	54,040

For the nine months ended September 30, 2012 and 2011, the Company capitalized $535 and $305, respectively, of costs incurred to acquire, develop and extend patents in the United States and various other countries.

Amortization expense for intangible assets for the quarter and nine months ended September 30, 2012 was $3,079 and $9,519, respectively, compared to $855 and $2,806 for the quarter and nine months ended September 30, 2011.

Annual amortization expense for intangible assets for 2012, 2013, 2014,  2015 and 2016 is expected to be $12,545, $12,090, $11,974, $10,765 and $9,624, respectively.