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Derivative Financial Instruments and Fair Value Measurements (Tables) | 6 Months Ended
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Mar. 31, 2022
Derivative Financial Instruments and Fair Value Measurements |
Notional principle, fixed rates and related expiration dates of outstanding interest rate swap agreements | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2022
Notional Amount | ​ | Notional Amount | ​ | Fixed | ​ | Effective | ​ | Expiration
Currency |  | (in millions) |  | Rate | ​ | Date |  | Date
USD | ​ | 200.0 |  | 2.60% | ​ | March 2018 | ​ | February 2023
USD | ​ | 400.0 | ​ | 1.349% | ​ | February 2023 | ​ | March 2028
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2021
Notional Amount | ​ | Notional Amount | ​ | Fixed | ​ | Effective | ​ | Expiration
Currency |  | (in millions) |  | Rate | ​ | Date |  | Date
USD | ​ | 200.0 | ​ | 2.60% | ​ | March 2018 | ​ | February 2023
USD | ​ | 400.0 |  | 1.349% | ​ | February 2023 | ​ | March 2028

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- Definition Disclosure information pertaining to derivative instruments and fair value measurements. + References No definition available. + Details
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- Definition Tabular disclosure of the notional amounts, fixed rates and related expiration dates of outstanding derivative positions. + References No definition available. + Details
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