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
		Dec. 31, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Balance, beginning		$ 5,847	$ 3,922
Changes in estimates		298	344
Write-offs		(459)	(83)
Other	[1]	91	20
Balance, ending		$ 5,777	$ 4,203

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