Goodwill and Acquired Intangibles (Tables)

9 Months Ended

Sep. 26, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill

The changes in the carrying amount of goodwill during the nine months ended September 26, 2020 were as follows:

	Gross Carrying Amount
	(In thousands)
Balance as of December 28, 2019	$	661,856
Goodwill resulting from acquisitions	120,219
Effect of foreign currency translation	(1,233)
Balance as of September 26, 2020	$	780,842

Schedule of acquired intangibles with finite and indefinite lives (excluding goodwill)

Acquired intangibles as of September 26, 2020 were as follows, excluding intangibles that were fully amortized as of December 28, 2019:

	Gross Carrying Amount		Accumulated Amortization		Acquired Intangibles, Net
	(In thousands)
Existing technology	$	370,834	$	(218,553)	$	152,281
Agreements and relationships	180,011		(108,736)		71,275
Tradenames, trademarks and patents	10,590		(6,393)		4,197
Total acquired intangibles	$	561,435	$	(333,682)	$	227,753

Acquired intangibles as of December 28, 2019 were as follows, excluding intangibles that were fully amortized as of December 29, 2018:

	Gross Carrying Amount		Accumulated Amortization		Acquired Intangibles, Net
	(In thousands)
Existing technology	$	363,142	$	(245,902)	$	117,240
Agreements and relationships	146,395		(112,565)		33,830
Tradenames, trademarks and patents	7,600		(5,795)		1,805
Total acquired intangibles with definite lives	517,137		(364,262)		152,875
In-process technology	19,500		—		19,500
Total acquired intangibles	$	536,637	$	(364,262)	$	172,375

Amortization of acquired intangibles

Amortization of acquired intangibles for the three and nine months ended September 26, 2020 and September 28, 2019 was as follows:

	Three Months Ended				Nine Months Ended
	September 26, 2020		September 28, 2019		September 26, 2020		September 28, 2019
	(In thousands)
Cost of product and maintenance	$	11,447	$	9,925	$	33,791	$	31,078
Amortization of acquired intangibles	4,438		2,874		13,234		9,341
Total amortization of acquired intangibles	$	15,885	$	12,799	$	47,025	$	40,419

Estimated amortization expense

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

	(In thousands)
2020 - remaining period	$	17,169
2021	61,705
2022	43,400
2023	27,870
2024	26,407
Thereafter	51,202
Total estimated amortization expense	$	227,753