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Earnings per Share - EPS Reconciliation (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Numerator: |  |
Net income | $ 69.1 | $ 76.6
Less: Allocation to participating securities | (2.4) | (2.4)
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic | 66.7 | 74.2
Net income allocated to common stockholders | $ 66.7 | $ 74.2
Denominator: |  |
Common shares outstanding (in shares) | 30,233,107 | 29,657,724
Dilutive potential common shares outstanding: |  |
Share-based awards (in shares) | 1,041,200 | 1,092,054
Diluted weighted - average common shares (in shares) | 31,274,307 | 30,749,778

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