Restructuring and Related Costs (Narrative) (Details) - USD ($)	3 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	$ 0
2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	4,871,000
Employee Severance | 2018 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cost incurred to date	880,000
Employee Severance | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	130,000	93,000
Cost incurred to date	4,579,000
Facility Closing | 2017 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	$ 162,000
Cost incurred to date	$ 292,000