Stockholders' Equity (Summary of Activity for RSUs) (Details) - Restricted Stock Units (RSUs) [Member] shares in Thousands	12 Months Ended
	Sep. 30, 2024 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of units, Beginning balance | shares	177
Granted, Number of units | shares	178
Vested, Number of units | shares	(30)
Forfeited, Number of units | shares	(7)
Number of units, Ending balance | shares	318
Weighted-Average Grant Date Fair Value, Beginning balance | $ / shares	$ 93.46
Granted, Weighted-Average Grant Date Fair Value | $ / shares	139.04
Vested, Weighted-Average Grant Date Fair Value | $ / shares	88.97
Forfeited, Weighted-Average Grant Date Fair Value | $ / shares	149.02
Weighted-Average Grant Date Fair Value, Ending balance | $ / shares	$ 118.19