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Stock-Based Compensation (Options and Common Shares Reserved for Grant) (Details) - Stock Options
$ / shares in Units, shares in Thousands, $ in Thousands
 6 Months Ended
Mar. 31, 2025
USD ($)
$ / shares
shares
Options Outstanding [Roll Forward]  
Options Outstanding, Beginning Balance (in shares) | shares 1,382
Options Outstanding, Granted (in shares) | shares 63
Options Outstanding, Exercised (in shares) | shares (515)
Options Outstanding, Forfeited / Canceled (in shares) | shares (12)
Options Outstanding, Ending Balance (in shares) | shares 918
Options Outstanding, Exercisable (in shares) | shares 684
Weighted Average Exercise Price [Roll Forward]  
Weighted Average Exercise Price, Beginning Balance $ 19.01
Weighted Average Exercise Price, Granted 31.56
Weighted Average Exercise Price, Exercised 24.54
Weighted Average Exercise Price, Forfeited / Canceled 28.47
Weighted Average Exercise Price, Ending Balance 21.58
Weighted Average Exercise Price, Exercisable $ 19.73
Weighted Average Remaining Contractual Term [Abstract]  
Weighted Average Remaining Contractual Term, Outstanding 3 years 3 months 18 days
Weighted Average Remaining Contractual Term, Exercisable 2 years 8 months 12 days
Aggregate Intrinsic Value, Outstanding | $ $ 6,594 [1]
Aggregate Intrinsic Value, Exercisable | $ $ 6,001 [1]
Closing Stock Price $ 27.83
[1] The aggregate intrinsic value represents the total pre-tax intrinsic value, based on our closing stock price of $27.83 as of March 31, 2025, which would have been received by the option holders had all option holders exercised their options as of that date.
12. STOCK-BASED COMPENSATION (CONTINUED)
The intrinsic value of an option is the amount by which the fair value of the underlying stock exceeds its exercise price.