Other Comprehensive Income (Loss) - Cash Flow Hedges (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
AOCI
Beginning balance	$ 573,740	$ 516,574
Ending balance	811,068	521,159
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest
AOCI
Beginning balance	7,502	18,694
Net OCI changes	2,536	(6,705)
Ending balance	$ 10,038	$ 11,989