Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2024	Sep. 30, 2023
Income Taxes [Line Items]
Gross unrecognized tax benefits	$ 13,723	$ 11,112
Unrecognized tax benefits that, if recognized, would affect the effective tax rate	8,718
Possible decrease in unrecognized tax benefits liability	$ 2,178
Domestic Tax Authority [Member]
Income Taxes [Line Items]
Year remaining open to tax examination	2020
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Year remaining open to tax examination	2018
Foreign Jurisdiction [Member]
Income Taxes [Line Items]
Year remaining open to tax examination	2018