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Shareholders' Equity (Narrative) (Details) - $ / shares | Apr. 19, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Class Of Stock [Line Items] |  |  |
Preferred stock, shares authorized |  | 12,500,000 |
Subsequent Event [Member] |  |  |
Class Of Stock [Line Items] |  |  |
Dividends payable, date declared | Apr. 19, 2022 |  |
Dividends payable, date to be paid | May 20, 2022 |  |
Dividends payable, date of record | May 10, 2022 |  |
Series B [Member] |  |  |
Class Of Stock [Line Items] |  |  |
Preferred stock, shares authorized |  | 1,450,000 | 1,450,000
Series B [Member] | Subsequent Event [Member] |  |  |
Class Of Stock [Line Items] |  |  |
Preferred stock dividends declared | $ 0.453125 |  |
Series C [Member] |  |  |
Class Of Stock [Line Items] |  |  |
Preferred stock, shares authorized |  | 6,450,000 | 6,450,000
Series C [Member] | Subsequent Event [Member] |  |  |
Class Of Stock [Line Items] |  |  |
Preferred stock dividends declared | $ 0.406250 |  |

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