Restructuring and Impairment Charges Narrative (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Jul. 04, 2020	Apr. 04, 2020	Jan. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	$ 0	$ 6,003	$ 0	$ 0	$ 6,003	$ 0
Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Other Tax Expense (Benefit)					(600)
Fixed Asset and Operating Right-of-Use Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	0	3,054			3,100
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment charges	$ 0	$ 2,949			$ 2,900