Revenue (Schedule of Uncollectible Amounts And Change in Expected Allowance for Credit Losses for Trade Accounts Receivable and Unbilled Receivables) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue from Contract with Customer [Abstract]
Balance, beginning		$ 8,558	$ 7,126	$ 7,738	$ 5,847
Changes in estimates		519	835	1,325	2,531
Write-offs			(13)	(120)	(488)
Other	[1]	(101)	(987)	33	(929)
Balance, ending		$ 8,976	$ 6,961	$ 8,976	$ 6,961

[1] Includes effects of foreign exchange rate changes during the period.