Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill and Other Intangible Assets [Abstract]

Schedule of the Changes in the Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the years ended December 31, 2011 and 2010 were as follows (in thousands):

	Goodwill
Ending balance, December 31, 2009	$	441,347
Velocitude acquisition	11,567
Ending balance, December 31, 2010 and 2011	$	452,914

Schedule of Other Intangible Assets

Other intangible assets that are subject to amortization consist of the following (dollars in thousands):

	December 31, 2011
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Amortization period in years
Completed technologies	$	36,731	$	(22,913	)	$	13,818	6
Customer relationships	88,700		(60,202		)	28,498		9
Non-compete agreements	8,340		(5,270		)	3,070		4
Trademarks and trade names	800		(800		)	—		4
Acquired license rights	490		(490		)	—		10
Total	$	135,061	$	(89,675	)	$	45,386

	December 31, 2010
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Weighted Average Amortization period in years
Completed technologies	$	36,731	$	(16,520	)	$	20,211	6
Customer relationships	88,700		(50,832		)	37,868		9
Non-compete agreements	8,340		(4,070		)	4,270		4
Trademarks	800		(693		)	107		4
Acquired license rights	490		(490		)	—		10
Total	$	135,061	$	(72,605	)	$	62,456