Employee Benefit Plans (Net Periodic Benefit Cost For Defined Benefit Retirement Plan) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Retirement Benefits [Abstract]
Service cost	$ 1,282	$ 1,426	$ 971
Interest cost	640	431	608
Expected return on plan assets	(1,270)	(1,085)	(1,027)
Net amortization and deferral	526	996	584
Net periodic benefit cost	$ 1,178	$ 1,768	$ 1,136