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Earnings per Share - EPS Reconciliation (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Numerator: |  |
Net income | $ 19.5 | $ 16.3
Less: Allocation to participating securities | (0.5) | (0.3)
Net income allocated to common stockholders | $ 19.0 | $ 16.0
Denominator: |  |
Common shares outstanding (in shares) | 18,940,876 | 18,750,270
Dilutive potential common shares outstanding: |  |
Share-based awards (in shares) | 529,977 | 324,292
Diluted weighted - average common shares (in shares) | 19,470,853 | 19,074,562

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