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, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Balance, beginning		$ 7,126	$ 9,949	$ 5,847	$ 3,922
Changes in estimates		835	77	2,531	6,463
Write-offs		(13)	(1,271)	(488)	(1,601)
Other	[1]	(987)	(55)	(929)	(84)
Balance, ending		$ 6,961	$ 8,700	$ 6,961	$ 8,700

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