Restructuring Charges - Restructuring Activities (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Oct. 04, 2020	Dec. 29, 2019	Sep. 29, 2019	Oct. 04, 2020	Sep. 29, 2019
Restructuring Reserve [Roll Forward]
2020	$ 1,881		$ (672)	$ 3,156	$ (672)
2018 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year				2,672
2020				(1,651)
2020				(922)
Balance at September 29, 2019	99	$ 2,672		99
2018 Restructuring Plan [Member] | Workforce Reduction
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year				1,898
2020				(1,576)
2020				(223)
Balance at September 29, 2019	99	1,898		99
2018 Restructuring Plan [Member] | Other Exit Costs
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year				774
2020				(75)
2020				(699)
Balance at September 29, 2019	0	774		0
2019 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year				8,773
2020				(2,787)
2020		(9,000)		(2,234)
Balance at September 29, 2019	3,752	8,773		3,752
2019 Restructuring Plan [Member] | Workforce Reduction
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year				8,634
2020				(2,648)
2020				(2,234)
Balance at September 29, 2019	3,752	8,634		3,752
2019 Restructuring Plan [Member] | Other Exit Costs
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year				139
2020				(139)
2020				0
Balance at September 29, 2019	$ 0	$ 139		$ 0