Goodwill and Acquisition-Related Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended
Jun. 27, 2020	Mar. 28, 2020
Gross and net amounts of goodwill and of acquisition-related intangibles
Goodwill	$ 619,196	$ 619,196
Total acquisition-related intangibles, gross	361,882	361,882
Less accumulated amortization	(171,097)	(161,538)
Acquisition-related intangibles, net	190,785	200,344
Total	133,793
Core Technology [Member]
Gross and net amounts of goodwill and of acquisition-related intangibles
Total finite-lived acquisition-related intangibles, gross	209,131	209,131
Less accumulated amortization	(111,703)	(105,007)
Total	$ 97,428	104,124
Weighted-Average Amortization Life	3 years 10 months 24 days
Other Intangibles [Member]
Gross and net amounts of goodwill and of acquisition-related intangibles
Total finite-lived acquisition-related intangibles, gross	$ 95,759	95,759
Less accumulated amortization	(59,394)	(56,531)
Total	$ 36,365	39,228
Weighted-Average Amortization Life	3 years 10 months 24 days
In-process research and development
Gross and net amounts of goodwill and of acquisition-related intangibles
In-process research and development	$ 56,992	$ 56,992

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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