Stock-Based Compensation (Options and Common Shares Reserved for Grant) (Details) - Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2022 USD ($) $ / shares shares
Options Outstanding [Roll Forward]
Options Outstanding, Beginning Balance | shares	2,952
Options Outstanding, Granted | shares	575
Options Outstanding, Exercised | shares	(1,532)
Options Outstanding, Forfeited / Cancelled | shares	(205)
Options Outstanding, Ending Balance | shares	1,790
Options Outstanding, Exercisable | shares	846,530
Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Beginning Balance	$ 13.20
Weighted Average Exercise Price, Granted	22.52
Weighted Average Exercise Price, Exercised	14.75
Weighted Average Exercise Price, Forfeited / Cancelled	17.86
Weighted Average Exercise Price, Ending Balance	17.29
Weighted Average Exercise Price, Exercisable	$ 14.26
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Term, Outstanding	4 years 8 months 12 days
Weighted Average Remaining Contractual Term, Exercisable	3 years 7 months 6 days
Aggregate Intrinsic Value, Outstanding | $	$ 29,095
Aggregate Intrinsic Value, Exercisable | $	$ 16,325
Closing Stock Price	$ 33.54