| 2023-03-01 | Corporate Earnings Per Share(1) |
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| 2023-03-01 | Corporate Earnings Per Share(1) |
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| 2023-03-01 | Corporate Earnings Per Share(1) |
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| 2023-03-01 | Corporate Earnings Per Share(1) |
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| 2023-03-01 | Corporate Earnings Per Share(1) |
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| 2023-03-01 | Corporate Return on Equity(1) |
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| 2023-03-01 | Corporate Return on Equity(1) |
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| 2023-03-01 | Corporate Return on Equity(1) |
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| 2023-03-01 | Corporate Return on Equity(1) |
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| 2023-03-01 | Corporate Return on Equity(1) |
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| 2023-03-01 | Total Shareholder Return(2) |
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| 2023-03-01 | Total Shareholder Return(2) |
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| 2023-03-01 | Total Shareholder Return(2) |
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| 2023-03-01 | Total Shareholder Return(2) |
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| 2023-03-01 | Total Shareholder Return(2) |
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| 2023-03-01 | Electric Platform Return on Equity(1) |
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| 2023-03-01 | Electric Platform Net Income(1) |
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| 2023-03-01 | Manufacturing Platform Net Income(1) |
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| 2023-03-01 | Safety - Otter Tail Corporation(1) |
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| 2023-03-01 | Safety - Otter Tail Corporation(1) |
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| 2023-03-01 | Safety - Otter Tail Corporation(1) |
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| 2023-03-01 | Safety -Electric Platform(1) |
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| 2023-03-01 | Safety -Manufacturing Platform(1) |
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| 2024-02-28 | Corporate Earnings Per Share |
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| 2024-02-28 | Corporate Earnings Per Share |
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| 2024-02-28 | Corporate Earnings Per Share |
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| 2024-02-28 | Corporate Earnings Per Share |
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| 2024-02-28 | Corporate Earnings Per Share |
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| 2024-02-28 | Corporate Return on Equity |
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| 2024-02-28 | Corporate Return on Equity |
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| 2024-02-28 | Corporate Return on Equity |
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| 2024-02-28 | Corporate Return on Equity |
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| 2024-02-28 | Corporate Return on Equity |
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| 2024-02-28 | Total Shareholder Return |
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| 2024-02-28 | Total Shareholder Return |
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| 2024-02-28 | Total Shareholder Return |
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| 2024-02-28 | Total Shareholder Return |
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| 2024-02-28 | Total Shareholder Return |
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| 2024-02-28 | Electric Platform Return on Equity |
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| 2024-02-28 | Electric Platform Net Income |
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| 2024-02-28 | Manufacturing Platform Net Income |
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| 2025-03-03 | Corporate Earnings Per Share |
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| 2025-03-03 | Corporate Earnings Per Share |
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| 2025-03-03 | Corporate Earnings Per Share |
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| 2025-03-03 | Corporate Earnings Per Share |
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| 2025-03-03 | Corporate Earnings Per Share |
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| 2025-03-03 | Corporate Return on Equity |
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| 2025-03-03 | Corporate Return on Equity |
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| 2025-03-03 | Corporate Return on Equity |
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| 2025-03-03 | Corporate Return on Equity |
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| 2025-03-03 | Corporate Return on Equity |
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| 2025-03-03 | Total Shareholder Return |
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| 2025-03-03 | Total Shareholder Return |
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| 2025-03-03 | Total Shareholder Return |
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| 2025-03-03 | Total Shareholder Return |
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| 2025-03-03 | Total Shareholder Return |
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| 2025-03-03 | Electric Platform Return on Equity |
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| 2025-03-03 | Electric Platform Net Income |
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| 2025-03-03 | Manufacturing Platform Net Income |
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| 2026-03-02 | Corporate Earnings Per Share |
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| 2026-03-02 | Corporate Earnings Per Share |
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| 2026-03-02 | Corporate Earnings Per Share |
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| 2026-03-02 | Corporate Earnings Per Share |
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| 2026-03-02 | Corporate Earnings Per Share |
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| 2026-03-02 | Corporate Return on Equity |
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| 2026-03-02 | Corporate Return on Equity |
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| 2026-03-02 | Corporate Return on Equity |
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| 2026-03-02 | Corporate Return on Equity |
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| 2026-03-02 | Corporate Return on Equity |
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| 2026-03-02 | Total Shareholder Return |
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| 2026-03-02 | Total Shareholder Return |
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| 2026-03-02 | Total Shareholder Return |
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| 2026-03-02 | Total Shareholder Return |
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| 2026-03-02 | Total Shareholder Return |
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| 2026-03-02 | Electric Platform Return on Equity |
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| 2026-03-02 | Electric Platform Net Income |
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| 2026-03-02 | Manufacturing Platform Net Income |
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