Debt and Financing Arrangements - Gain (Loss) on Derivatives (Details) - Cash Flow Hedging - Interest Rate Swaps - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in AOCI on Derivatives			$ 5,636	$ 1,787
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in Income on Derivatives	$ (470)	$ (790)	(2,006)	(2,444)
Amount of Loss Reclassified from AOCI into Income (Effective Portion*)			$ (1,513)	$ (1,845)