Derivatives (Narratives) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2023	Jun. 30, 2023	Jun. 30, 2022
AOCI Attributable To Parent [Abstract]
Interest expense	$ 63,943	$ 57,193	$ 124,541	$ 106,992
Derivative Fair Value Of Derivative Net [Abstract]
Derivative hedges, net market value	$ 7,200	$ 6,400	7,200	6,400
Amounts reclassified from AOCI to interest expense			$ 1,900	$ 5,700	$ 400
Other Investments [Member]
Derivative Fair Value Of Derivative Net [Abstract]
Notional amount (lease)						$ 4,700	$ 7,800