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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2016
Stockholders Equity Note [Abstract] |
Schedule Of Dividends | The following table provides a summary of dividends declared and paid per share:
|  | Years ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Common stock |  | $ | 0.200 |  |  | $ | 0.200 |  |  | $ | 0.200 |
7.250% Series B Preferred Stock |  | $ | 1.812 |  |  | $ | 1.812 |  |  | $ | 1.812 |

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