Derivative Financial Instruments (Amounts Recognized in AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized derivative gain on cash flow hedges, net of tax	$ 21,730	$ 9,091	$ 28,311	$ 10,093
Other Comprehensive Income (Loss) | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized derivative gain on cash flow hedges, net of tax	21,185	8,476	27,058	8,936
Interest rate swaps | Other Comprehensive Income (Loss) | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized derivative gain on cash flow hedges, net of tax	21,077	8,811	26,948	9,268
Foreign currency forward contracts | Other Comprehensive Income (Loss) | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized derivative gain on cash flow hedges, net of tax	100	(335)	82	(332)
Commodity swaps | Other Comprehensive Income (Loss) | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized derivative gain on cash flow hedges, net of tax	$ 8	$ 0	$ 28	$ 0