Stockholders' Equity (Summary of Activity for PSUs) (Details) - Performance Restricted Stock Units [Member] - $ / shares shares in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2024	Jun. 30, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of units, Beginning balance	66
Granted, Number of units		66
Forfeited, Number of units	(4)	(4)
Number of units, Ending balance	62	62
Weighted-Average Grant Date Fair Value, Beginning balance	$ 146.47
Granted, Weighted-Average Grant Date Fair Value		$ 146.47
Forfeited, Weighted-Average Grant Date Fair Value	146.47	146.47
Weighted-Average Grant Date Fair Value, Ending balance	$ 146.47	$ 146.47