Intangible Assets

3 Months Ended

Apr. 01, 2012

Intangible Assets [Abstract]

Intangible Assets

K. Intangible Assets

Amortizable intangible assets consist of the following and are included in intangible assets on the balance sheet:

	April 1, 2012
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Useful Life
	(in thousands)
Developed technology	$	358,155	$	104,378	$	253,777		6.3 years
Customer relationships and service and software maintenance contracts		144,971		49,788		95,183		8.0 years
Trade names and trademarks		33,840		8,254		25,586		9.0 years
Customer backlog		1,000		1,000		—		0.4 years
Total intangible assets	$	537,966	$	163,420	$	374,546		7.0 years

	December 31, 2011
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Useful Life
	(in thousands)
Developed technology	$	358,155	$	91,391	$	266,764		6.3 years
Customer relationships and service and software maintenance contracts		144,971		45,230		99,741		8.0 years
Trade names and trademarks		33,840		7,370		26,470		9.0 years
Customer backlog		1,000		1,000		—		0.4 years
Total intangible assets	$	537,966	$	144,991	$	392,975		7.0 years

Aggregate intangible asset amortization expense was $18.4 million and $7.3 million, respectively, for the three months ended April 1, 2012 and April 3, 2011. Estimated intangible asset amortization expense for each of the five succeeding fiscal years is as follows:

Year	Amortization Expense (in thousands)
2012 (remainder)	$	55,079
2013		72,459
2014		69,374
2015		52,351
2016		52,351