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Goodwill and Acquired Intangibles (Tables)

3 Months Ended

Apr. 01, 2017

The changes in the carrying amount of goodwill during the three months ended April 1, 2017 were as follows:



	Gross Carrying Amount
	(In thousands)
Balance as of December 31, 2016	$	572,764
Effect of foreign currency translation	1,781
Balance as of April 1, 2017	$	574,545

Acquired intangibles as of April 1, 2017 were as follows, excluding intangibles that were fully amortized as of December 31, 2016:



	Gross Carrying Amount		Accumulated Amortization			Acquired Intangibles, Net
	(In thousands)
Existing technology	$	340,345	$	(168,706	)	$	171,639
Agreements and relationships	150,031		(79,952		)	70,079
Tradenames, trademarks and patents	9,018		(6,291		)	2,727
Total acquired intangibles	$	499,394	$	(254,949	)	$	244,445

Acquired intangibles as of December 31, 2016 were as follows, excluding intangibles that were fully amortized as of January 2, 2016:



	Gross Carrying Amount		Accumulated Amortization			Acquired Intangibles, Net
	(In thousands)
Existing technology	$	342,108	$	(160,178	)	$	181,930
Agreements and relationships	174,623		(100,778		)	73,845
Tradenames, trademarks and patents	9,806		(6,767		)	3,039
Total acquired intangibles	$	526,537	$	(267,723	)	$	258,814

Amortization of acquired intangibles for the three months ended April 1, 2017 and April 2, 2016 was as follows:



	Three Months Ended
	April 1, 2017		April 2, 2016
	(In thousands)
Cost of product and maintenance	$	10,578	$	10,663
Amortization of acquired intangibles	3,856		5,780
Total amortization of acquired intangibles	$	14,434	$	16,443

Estimated amortization expense for intangible assets with definite lives for the following five fiscal years and thereafter is as follows:



	(In thousands)
2017 – remaining period	$	41,615
2018	52,267
2019	45,250
2020	40,039
2021	35,546
Thereafter	29,728
Total estimated amortization expense	$	244,445