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Note 4 - Earnings Per Common Share | 12 Months Ended
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Sep. 30, 2022
Notes to Financial Statements |
Earnings Per Share [Text Block] | 4. EARNINGS PER COMMON SHARE
|  | 2022 |  |  | 2021 |  |  | 2020 |
Basic Earnings Per Common Share: |  |  |  |  |  |  |  |  |  |  |  |
Net Income |  | $ | 220.8 |  |  | $ | 271.7 |  |  | $ | 88.6 |
Less: Provision for preferred dividends |  |  | 14.8 |  |  |  | 14.8 |  |  |  | 14.8 |
Income allocated to participating securities |  |  | 0.3 |  |  |  | 0.4 |  |  |  | 0.1 |
Net Income Available to Common Shareholders |  | $ | 205.7 |  |  | $ | 256.5 |  |  | $ | 73.7 |
Weighted Average Common Shares Outstanding (in millions) |  |  | 52.0 |  |  |  | 51.6 |  |  |  | 51.2 |
Basic Earnings Per Share of Common Stock |  | $ | 3.96 |  |  | $ | 4.97 |  |  | $ | 1.44 |
Diluted Earnings per Common Share: |  |  |  |  |  |  |  |  |  |  |  |
Net Income |  | $ | 220.8 |  |  | $ | 271.7 |  |  | $ | 88.6 |
Less: Provision for preferred dividends |  |  | 14.8 |  |  |  | 14.8 |  |  |  | 14.8 |
Income allocated to participating securities |  |  | 0.3 |  |  |  | 0.4 |  |  |  | 0.1 |
Net Income Available to Common Shareholders |  | $ | 205.7 |  |  | $ | 256.5 |  |  | $ | 73.7 |
Weighted Average Common Shares Outstanding (in millions) |  |  | 52.0 |  |  |  | 51.6 |  |  |  | 51.2 |
Dilutive Effect of Restricted Stock and Restricted Stock Units (in millions)* |  |  | 0.1 |  |  |  | 0.1 |  |  |  | 0.1 |
Weighted Average Diluted Common Shares (in millions) |  |  | 52.1 |  |  |  | 51.7 |  |  |  | 51.3 |
Diluted Earnings Per Share of Common Stock |  | $ | 3.95 |  |  | $ | 4.96 |  |  | $ | 1.44 |
* Calculation excludes certain outstanding common shares (shown in millions by period at the right) attributable to stock units subject to performance or market conditions and restricted stock, which could have a dilutive effect in the future |  |  | 0.1 |  |  |  | 0.1 |  |  |  | 0.1 |

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