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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Jun. 30, 2022
Accounting Policies [Abstract] |
Realized gains (losses) on derivatives not designated as hedging instruments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended | ​
​ | ​ | June 30, | ​ | June 30, | ​
​ |  | 2022 |  | 2021 |  | 2022 |  | 2021 |
Realized gains (losses) on derivatives not designated as hedging instruments | ​ | $ | 848 | ​ | $ | (961) | ​ | $ | 1,903 | ​ | $ | (7,295) | ​

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- Definition Tabular disclosure of derivative instrument not designated or qualifying as hedging instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109998890-113959 + Details
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