Employee Benefit Plans (Defined Benefit Retirement Plan Assets Subject To Fair Value Measurements) (Details) - USD ($) $ in Thousands	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined benefit retirement plan assets	$ 23,871	$ 22,886	$ 19,950
Mutual Fund [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit retirement plan assets	$ 23,871	$ 22,886