Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 30, 2017

Goodwill and Other Intangible Assets

Summary of goodwill activity

        The following summarizes the activity in goodwill for the years ended December 30, 2017 and December 31, 2016 (in thousands):

	Year Ended
	December 30, 2017		December 31, 2016
Beginning balance	$	276,130	$	272,722
Additions due to business combinations		12,097		3,408
Ending balance	$	288,227	$	276,130

Schedule of gross carrying amount and accumulated amortization of other intangible assets

        The gross carrying amount and accumulated amortization of other intangible assets are as follows (in thousands):

			December 30, 2017					December 31, 2016
	Weighted-Average Amortization Period (Years)
			Gross Amount		Accumulated Amortization			Gross Amount		Accumulated Amortization
Core and developed technology		9	$	161,700	$	(89,442	)	$	157,321	$	(70,181	)
Customer relationships		7		25,470		(16,180	)		24,970		(11,356	)
Patents		6		3,000		(2,750	)		3,000		(2,250	)
Trademarks		7		3,690		(2,344	)		3,690		(1,629	)
Total		8	$	193,860	$	(110,716	)	$	188,981	$	(85,416	)

Schedule of estimated aggregate amortization expense for intangible assets subject to amortization for each of the five succeeding fiscal years

        The estimated aggregate amortization expense for intangible assets subject to amortization for each of the five succeeding fiscal years is as follows (in thousands):

Fiscal Year
2018	$	24,034
2019		18,292
2020		15,797
2021		11,408
2022		7,905