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Retirement Plans (Strategic Allocation of Plan Assets) (Details) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Strategic asset allocation |  |  |
Defined Benefit Plan, Target Plan Asset Allocations | 100.00% |  |
Actual asset allocations |  |  |
Actual plan asset allocations | 100.00% | 100.00% | 100.00%
Equity Securities [Member] |  |  |
Strategic asset allocation |  |  |
Defined Benefit Plan, Target Plan Asset Allocations | 40.00% |  |
Equity investments tactical range, minimum | 30.00% |  |
Equity investments tactical range, maximum | 50.00% |  |
Actual asset allocations |  |  |
Actual plan asset allocations | 40.00% | 40.00% | 59.00%
Large Capitalization Stocks [Member] |  |  |
Strategic asset allocation |  |  |
Defined Benefit Plan, Target Plan Asset Allocations | 26.00% |  |
Small Capitalization Stocks [Member] |  |  |
Strategic asset allocation |  |  |
Defined Benefit Plan, Target Plan Asset Allocations | 5.00% |  |
International Stocks [Member] |  |  |
Strategic asset allocation |  |  |
Defined Benefit Plan, Target Plan Asset Allocations | 9.00% |  |
Fixed Income Funds [Member] |  |  |
Strategic asset allocation |  |  |
Defined Benefit Plan, Target Plan Asset Allocations |  | 60.00% |
Equity investments tactical range, minimum | 50.00% |  |
Equity investments tactical range, maximum | 70.00% |  |
Actual asset allocations |  |  |
Actual plan asset allocations | 59.00% | 59.00% | 39.00%
Cash and Cash Equivalents [Member] |  |  |
Strategic asset allocation |  |  |
Defined Benefit Plan, Target Plan Asset Allocations | 0.00% |  |
Equity investments tactical range, minimum | 0.00% |  |
Equity investments tactical range, maximum | 5.00% |  |
Actual asset allocations |  |  |
Actual plan asset allocations | 1.00% | 1.00% | 2.00%

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- Definition Target allocation of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920 + Details
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- Definition Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920 + Details
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