Goodwill and Intangible Assets, Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Jun. 27, 2020
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	$ 657,575		$ 657,575
Accumulated Amortization	584,091		578,811
Net	73,484		78,764
Intangible Assets, Gross	666,770		666,770
Total purchased intangible assets	82,679		87,959
Cost, Amortization	4,361	$ 3,111
Intangible asset amortization	919	756
Intangible Asset Amortization Expense	5,280	$ 3,867
Future amortization expense [Abstract]
Remaining three months of 2017	13,999
2019	13,454
2020	12,970
2021	9,995
2022	9,716
Thereafter	13,350
Net	73,484		78,764
Intellectual Property [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	525,196		525,196
Accumulated Amortization	462,780		458,418
Net	62,416		66,778
Future amortization expense [Abstract]
Net	62,416		66,778
Customer relationships [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	118,335		118,335
Accumulated Amortization	109,321		108,603
Net	9,014		9,732
Future amortization expense [Abstract]
Net	9,014		9,732
Tradename [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	11,374		11,374
Accumulated Amortization	9,393		9,265
Net	1,981		2,109
Future amortization expense [Abstract]
Net	1,981		2,109
Order or Production Backlog [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	170		170
Accumulated Amortization	97		25
Net	73		145
Future amortization expense [Abstract]
Net	73		145
Patents [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets, Gross	2,500		2,500
Accumulated Amortization	2,500		2,500
Net	0		0
Future amortization expense [Abstract]
Net	0		0
In Process Research and Development [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
IPR&D	$ 9,195		$ 9,195