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Retirement Benefit Plans (Details 5) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010
--- | --- | --- | ---
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | $ 18,949 | $ 16,642 | $ 16,653
Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 139 | 177 |
Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 16,717 | 14,372 |
Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 2,093 | 2,093 | 1,911
Large value [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 288 | 204 |
Large value [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Large value [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 288 | 204 |
Large value [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Large blend [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 8,592 | 6,945 |
Large blend [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Large blend [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 8,592 | 6,945 |
Large blend [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Large growth [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 640 | 832 |
Large growth [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Large growth [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 640 | 832 |
Large growth [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Mid blend [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 19 | 43 |
Mid blend [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Mid blend [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 19 | 43 |
Mid blend [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Small blend [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 4 | 34 |
Small blend [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Small blend [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 4 | 34 |
Small blend [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Foreign large blend [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 1,295 | 1,048 |
Foreign large blend [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Foreign large blend [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 1,295 | 1,048 |
Foreign large blend [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Diversified emerging markets [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 70 | 109 |
Diversified emerging markets [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Diversified emerging markets [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 70 | 109 |
Diversified emerging markets [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Inflation protected bond [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 952 | 489 |
Inflation protected bond [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Inflation protected bond [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 952 | 489 |
Inflation protected bond [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Intermediate term bond [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 6,412 | 6,176 |
Intermediate term bond [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Intermediate term bond [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 4,319 | 4,083 |
Intermediate term bond [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 2,093 | 2,093 |
High inflation bond [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 299 | 328 |
High inflation bond [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
High inflation bond [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 299 | 328 |
High inflation bond [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Emerging markets bonds [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 239 | 257 |
Emerging markets bonds [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Emerging markets bonds [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 239 | 257 |
Emerging markets bonds [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Short-term bonds [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 139 | 177 |
Short-term bonds [Member] | Level 1 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 139 | 177 |
Short-term bonds [Member] | Level 2 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | 0 | 0 |
Short-term bonds [Member] | Level 3 [Member] |  |  |
Amounts recognized in the consolidated balance sheets are: |  |  |
Asset Amount | $ 0 | $ 0 |

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=6867990&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 49 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(iv)(b)(i) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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