Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Sep. 30, 2023
Income Taxes [Line Items]
Gross unrecognized tax benefits	$ 11,858	$ 11,112
Unrecognized tax benefits that, if recognized, would affect the effective tax rate	7,588
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	2019
Foreign Jurisdiction [Member]
Income Taxes [Line Items]
Year remaining open to tax examination	2018