Employee Benefit Plans (Schedule Of Accumulated Benefit Obligations In Excess Of Fair Value Of Plan Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 43,482	$ 39,049
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	43,482	39,049	$ 38,976
Accumulated benefit obligation	43,482	39,049
Fair value of plan assets	24,319	23,399	24,785
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 1,224	$ 1,013	$ 1,299