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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | Oct. 18, 2019 | Sep. 30, 2019 | Dec. 31, 2018 | Dec. 18, 2018
--- | --- | --- | --- | ---
Class Of Stock [Line Items] |  |  |  |
Preferred stock, shares authorized |  | 12,500,000 |  |
Common stock repurchase, authorized |  |  |  | $ 30.0
Common stock repurchase, shares |  | 2,050,000 |  |
Common stock repurchase, weighted average price per share |  | $ 3.34 |  |
Additional number of common stock shares repurchased |  |  |  | 2,823,000
Additional common stock repurchased, weighted average price per share |  |  |  | $ 3.25
Series B [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Preferred stock, shares authorized |  | 1,450,000 | 1,450,000 |
Series C [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Preferred stock, shares authorized |  | 6,450,000 | 6,450,000 |
Subsequent Event [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Dividends payable, date declared | Oct. 18, 2019 |  |  |
Common stock, dividends declared | $ 0.05 |  |  |
Dividends payable, date to be paid | Nov. 20, 2019 |  |  |
Dividends payable, date of record | Nov. 08, 2019 |  |  |
Subsequent Event [Member] | Series B [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Preferred stock dividends declared | $ 0.453125 |  |  |
Subsequent Event [Member] | Series C [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Preferred stock dividends declared | $ 0.406250 |  |  |

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