| Debt - Gain (Loss) on Derivatives (Details) - Cash Flow Hedging - Interest Rate Swaps - USD ($) $ in Thousands | 3 Months Ended | |
|---|---|---|
| Dec. 31, 2021 | Dec. 31, 2020 | |
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Amount of Gain Recognized in AOCI on Derivatives | $ 875 | $ 353 | 
| Interest Expense | ||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Amount of Loss Recognized in Income on Derivatives | (801) | (903) | 
| Amount of Loss Reclassified from AOCI into Income (Effective Portion*) | $ (606) | $ (682) | 
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount, before tax and after reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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