Restructurings - Additional Information (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Apr. 03, 2020 USD ($)	Jun. 28, 2019 facility employee	Mar. 29, 2019 USD ($)	Apr. 03, 2020 USD ($)	Mar. 29, 2019 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance				$ 2,527
Charges and adjustments	$ 815		$ 3,182	2,049	$ 8,160
Charges paid/settled/other				(2,136)
Restructuring Reserve, Ending Balance	2,440			2,440
Ithaca Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance				83
Charges and adjustments	(40)		400	5,400
Charges paid/settled/other				(43)
Restructuring Reserve, Ending Balance	0			0
Design Facility Restructuring Plan
Restructuring Reserve [Roll Forward]
Charges and adjustments			2,800
2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance				1,993
Charges and adjustments	800			2,107
Charges paid/settled/other				(1,778)
Restructuring Reserve, Ending Balance	2,322			2,322
Number of positions eliminated | employee		250
Number of facilities | facility		6
Minimum | 2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Additional restructuring costs expected during the remainder of 2019	100			100
Maximum | 2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Additional restructuring costs expected during the remainder of 2019	200			200
Employee related expenses
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance				1,549
Charges and adjustments	390		465	1,549	1,618
Charges paid/settled/other				(799)
Restructuring Reserve, Ending Balance	2,299			2,299
Employee related expenses | Ithaca Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance				13
Charges and adjustments	0		200	1,400
Charges paid/settled/other				(13)
Restructuring Reserve, Ending Balance	0			0
Employee related expenses | Design Facility Restructuring Plan
Restructuring Reserve [Roll Forward]
Charges and adjustments			300
Employee related expenses | 2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance				1,536
Charges and adjustments	400			1,549
Charges paid/settled/other				(786)
Restructuring Reserve, Ending Balance	2,299			2,299
Facility related expenses
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance				978
Charges and adjustments	425		2,717	500	$ 6,542
Charges paid/settled/other				(1,337)
Restructuring Reserve, Ending Balance	141			141
Facility related expenses | Ithaca Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance				70
Charges and adjustments	(40)		200	4,000
Charges paid/settled/other				(30)
Restructuring Reserve, Ending Balance	0			0
Facility related expenses | Design Facility Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance				451
Charges and adjustments			$ 2,500	(18)
Charges paid/settled/other				(315)
Restructuring Reserve, Ending Balance	118			118
Facility related expenses | 2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning Balance				457
Charges and adjustments				558
Charges paid/settled/other				(992)
Restructuring Reserve, Ending Balance	23			23
Other Costs | 2019 Restructuring Plan
Restructuring Reserve [Roll Forward]
Charges and adjustments	$ 400			$ 600