Retirement Plans (Schedule Of Plan Asset Allocation) (Details)	12 Months Ended
	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets, Alternative investments	100.00%
Asset Allocation, Target, Alternative investments	100.00%
Large cap equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets, Equity securities	24.00%
Asset Allocation, Target, Equity securities	20.00%
Asset Allocation, Minimum, Equity securities	15.00%
Asset Allocation, Maximum, Equity securities	25.00%
Small cap equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets, Equity securities	14.00%
Asset Allocation, Target, Equity securities	5.00%
Asset Allocation, Minimum, Equity securities	0.00%
Asset Allocation, Maximum, Equity securities	10.00%
International equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets, Equity securities	18.00%
Asset Allocation, Target, Equity securities	25.00%
Asset Allocation, Minimum, Equity securities	15.00%
Asset Allocation, Maximum, Equity securities	35.00%
Core fixed funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets, Debt securities	26.00%
Asset Allocation, Target, Debt securities	25.00%
Asset Allocation, Minimum, Debt securities	20.00%
Asset Allocation, Maximum, Debt securities	30.00%
Real return bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets, Debt securities	5.00%
Asset Allocation, Target, Debt securities	3.00%
Asset Allocation, Minimum, Debt securities	0.00%
Asset Allocation, Maximum, Debt securities	10.00%
Alternative investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets, Alternative investments	5.00%
Asset Allocation, Target, Alternative investments	5.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Other, Range Minimum	0.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Other, Range Maximum	10.00%
Real estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Allocation, Target, Real estate	8.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Other, Range Maximum	10.00%
Asset Allocation, Minimum, Real estate	0.00%
Defined Benefit Plan, Real Estate	8.00%
High yield [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets, Alternative investments	0.00%
Asset Allocation, Target, Alternative investments	5.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Other, Range Minimum	0.00%
Commodities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets, Alternative investments	0.00%
Asset Allocation, Target, Alternative investments	4.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Other, Range Minimum	0.00%
Defined Benefit Plan, Target Allocation Percentage of Assets, Other, Range Maximum	10.00%