Restructuring and Related Cost (Narrative) (Details) - Test & Simulation $ in Thousands	12 Months Ended
	Oct. 03, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 11,848
China
Restructuring Cost and Reserve [Line Items]
Restructuring expense	4,265
Restructuring and related cost, expected cost	4,500
Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	6,000
Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost	7,000
COVID-19 Pandemic
Restructuring Cost and Reserve [Line Items]
Restructuring expense	2,028
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 5,555