Restructuring Charges - Restructuring Activities (Details) $ in Thousands		3 Months Ended
	Dec. 23, 2019 office	Apr. 05, 2020 USD ($)	Dec. 29, 2019 USD ($)	Mar. 31, 2019 USD ($)
Restructuring Reserve [Roll Forward]
Charged to Expenses 2020		$ 1,118		$ 0
2018 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year		2,672
Deductions 2020		(929)
Charged to Expenses 2020		(709)
Balance at September 29, 2019		1,034	$ 2,672
2018 Restructuring Plan [Member] | Workforce Reduction
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year		1,898
Deductions 2020		(929)
Charged to Expenses 2020		(29)
Balance at September 29, 2019		940	1,898
2018 Restructuring Plan [Member] | Other Exit Costs
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year		774
Deductions 2020		0
Charged to Expenses 2020		(680)
Balance at September 29, 2019		94	774
2019 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year		8,773
Deductions 2020		(981)
Charged to Expenses 2020		(409)	(9,000)
Balance at September 29, 2019		7,383	8,773
2019 Restructuring Plan [Member] | Workforce Reduction
Number Of Office Leases | office	2
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year		8,634
Deductions 2020		(981)
Charged to Expenses 2020		(409)
Balance at September 29, 2019		7,244	8,634
2019 Restructuring Plan [Member] | Other Exit Costs
Restructuring Reserve [Roll Forward]
Balance at Beginning of Year		139
Deductions 2020		0
Charged to Expenses 2020		0
Balance at September 29, 2019		$ 139	$ 139