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Fair Value Measurements (Details) - Recurring [Member] - USD ($) $ in Thousands | Mar. 31, 2016 | Sep. 30, 2015
--- | --- | ---
Assets [Abstract] |  |  |
Derivatives | [1] | $ 152 | $ 0
Trading securities |  | 19,001 | 18,444
Total assets at fair value |  | 19,153 | 18,444
Liabilities [Abstract] |  |  |
Derivatives | [1] | 5,898 | 3,686
Total liabilities at fair value |  | 5,898 | 3,686
Level 1 [Member] |  |  |
Assets [Abstract] |  |  |
Derivatives | [1] | 0 | 0
Trading securities |  | 19,001 | 18,444
Total assets at fair value |  | 19,001 | 18,444
Liabilities [Abstract] |  |  |
Derivatives | [1] | 0 | 0
Total liabilities at fair value |  | 0 | 0
Level 2 [Member] |  |  |
Assets [Abstract] |  |  |
Derivatives | [1] | 152 | 0
Trading securities |  | 0 | 0
Total assets at fair value |  | 152 | 0
Liabilities [Abstract] |  |  |
Derivatives | [1] | 5,898 | 3,686
Total liabilities at fair value |  | 5,898 | 3,686
Level 3 [Member] |  |  |
Assets [Abstract] |  |  |
Derivatives | [1] | 0 | 0
Trading securities |  | 0 | 0
Total assets at fair value |  | 0 | 0
Liabilities [Abstract] |  |  |
Derivatives | [1] | 0 | 0
Total liabilities at fair value |  | $ 0 | $ 0
[1] | Interest rate swaps are valued based on observable market swap rates and are classified within Level 2 of the fair value hierarchy.

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13495-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313 + Details
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