v3.26.1
Derivative Instruments and Hedging Activities (Impact of Derivative Instruments on Earnings) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivative Instruments Gain Loss [Line Items]        
Amount of (Gain) loss recognized in accumulated OCI $ (656) $ (35,582) $ 8,521 $ (26,616)
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 $ (870) $ 33,144 $ (8,127) $ 22,021
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 $ 656 $ 35,582 $ (8,521) $ 26,616
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