Revenue Recognition (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue from contracts with customers	$ 15,300	$ 17,600	$ 18,100
Interchange network charges	$ 4,200	$ 4,000	$ 3,600