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Note 3 Financial Instruments (Tables) | 6 Months Ended
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Mar. 31, 2018
Financial Instruments, Owned, at Fair Value [Abstract] |
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] |
| As of
| March 31, 2018 |  | September 30, 2017
Derivatives Designated as Accounting Hedges: |  |  |
Notional amount (in thousands) | $ | 102,102 |  |  | $ | 105,523 |
Number of contracts | 55 |  |  | 58 |
Derivatives Not Designated as Accounting Hedges: |  |  |
Notional amount (in thousands) | $ | 291,469 |  |  | $ | 302,944 |
Number of contracts | 44 |  |  | 46 |

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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
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