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Shareholders' Equity (Narrative) (Details) |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Apr. 19, 2021 $ / shares | Nov. 25, 2020 | Mar. 31, 2021 shares | Dec. 31, 2020 shares
Class Of Stock [Line Items] |  |  |  |
Preferred stock, shares authorized | shares |  |  | 12,500,000 |
Subsequent Event [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Dividends payable, date declared | Apr. 19, 2021 |  |  |
Common stock, dividends declared | $ / shares | $ 0.066 |  |  |
Dividends payable, date to be paid | May 20, 2021 |  |  |
Dividends payable, date of record | May 10, 2021 |  |  |
Series B [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Preferred stock, shares authorized | shares |  |  | 1,450,000 | 1,450,000
Series B [Member] | Subsequent Event [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Preferred stock dividends declared | $ / shares | $ 0.453125 |  |  |
Series C [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Preferred stock, shares authorized | shares |  |  | 6,450,000 | 6,450,000
Series C [Member] | Subsequent Event [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Preferred stock dividends declared | $ / shares | $ 0.406250 |  |  |
Common Stock [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Stockholders' equity, reverse stock split, conversion ratio |  | 0.15 |  |
Stockholders' equity, reverse stock split |  |  | Each 6.6 shares of the Company’s issued and outstanding common stock were combined into one share of the Company’s common stock. |

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