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Stockholders' Equity And Stock-Based Compensation (Summary Of Information On Performance-Based Restricted Stock Units Granted To Executive Officers That Have Not Yet Vested) (Details) - Executive Officer - Performance-Based Restricted Stock Units - shares				9 Months Ended
	Dec. 15, 2022	Dec. 15, 2021	Dec. 15, 2020	Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate Shares Granted at Target Award (in shares)	90,613	60,301	66,138
Percentage Vested of Target Award	200.00%	200.00%	200.00%	200.00%
Potential shares at vest date (in shares)	181,226	120,602	132,276

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