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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Equity [Abstract] |  |  |
Common shares, shares authorized (in shares) | 100,000,000 |  | 100,000,000
Preferred stock, shares authorized (in shares) | 50,000,000 |  | 50,000,000
Cash dividends declared per common share (in usd per share) | $ 0 | $ 0.05 |
Dividend declared |  | $ 2.7 |
Total authorizations which remain available for use | $ 55.9 |  |
Deferred tax (benefit) expense included in OCI |  | $ 10.8 |

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