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Financial Instruments and Fair Value Measurements (Narrative) (Details) - USD ($) | 12 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014
Financial liability on recurring basis | $ 0 | $ 0
Long Term Note Receivable From Municipality Within The State Of Illinois [Member] |  |
Interest rate used to estimate fair value | 3.00% | 3.20%
Long Term Note Receivable From Municipality Within The State Of Colorado [Member] |  |
Interest rate used to estimate fair value | 3.00% | 3.20%
Borrowings [Member] |  |
Interest rate used to estimate fair value | 2.80% | 2.40%

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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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Balance Type: | na
Period Type: | duration

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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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- Details
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- Details
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