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Derivative Instruments and Hedging Activities (Impact of Derivative Instruments on Earnings) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Mar. 31, 2026 | Mar. 31, 2025
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of (Gain) loss recognized in accumulated OCI | $ 7,329 | $ (11,402) | $ 9,177 | $ 8,966
Loss (gain) reclassified from accumulated OCI into earnings | Cash Flow Hedging |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of (Gain) loss reclassified from accumulated OCI into earnings | $ (7,791) | $ 16,560 | $ (7,257) | $ (11,123)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Selling, General and Administrative Expense | Selling, General and Administrative Expense | Selling, General and Administrative Expense | Selling, General and Administrative Expense
(Gain) recognized in accumulated OCI | Cash Flow Hedging |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of (Gain) loss recognized in accumulated OCI | $ (7,329) | $ 11,402 | $ (9,177) | $ (8,966)
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments and Tax, Statement of Income or Comprehensive Income [Extensible Enumeration] | Selling, General and Administrative Expense | Selling, General and Administrative Expense | Selling, General and Administrative Expense | Selling, General and Administrative Expense

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