Goodwill and Other Intangible Assets

The following table summarizes the changes in the carrying amount of goodwill (in thousands):



	Total
Balance as of December 31, 2013	$	11,117.8
Goodwill resulting from the acquisition of CSC	14,091.5
Balance as of September 30, 2014	$	25,209.3

The Company's intangible assets and related accumulated amortization as of September 30, 2014 and December 31, 2013 consisted of the following (in thousands):



		September 30, 2014							December 31, 2013
	Useful Life	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
Customer list	10 years	$	1,000.0	$	(370.1	)	$	629.9	$	1,000.0	$	(295.1	)	$	704.9
Manufacturing technology	10 years	3,900.0		(1,443.4		)	2,456.6		3,900.0		(1,150.9		)	2,749.1
Tradename	10 years	800.0		(296.1		)	503.9		800.0		(236.1		)	563.9
In process R&D	Indefinite	43,690.0		—			43,690.0		9,400.0		—			9,400.0
Patent rights	19 years	669.0		(237.7		)	431.3		669.0		(211.3		)	457.7
Total Intangible Assets		$	50,059.0	$	(2,347.3	)	$	47,711.7	$	15,769.0	$	(1,893.4	)	$	13,875.6

Total intangible amortization expense was classified in the operating expense categories for the periods included below as follows (in thousands):



	Nine Months Ended September 30,
	2014		2013
Cost of revenue	$	237.6	$	292.5
Research and development	81.3		26.4
Selling, general and administrative	135.0		135.0
Total	$	453.9	$	453.9

Estimated intangible amortization expense on an annual basis for the succeeding five years is as follow (in thousands):



2014	$	151.3
2015	605.2
2016	605.2
2017	605.2
2018	605.2
Thereafter	45,139.6
	$	47,711.7