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Subsequent Events (Tables) | 12 Months Ended
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Dec. 31, 2017
Subsequent Events [Abstract] |
Monthly Distributions Declared By Companys Board Of Directors | On January 9, 2018, our Board of Directors declared the following monthly distributions for the months of January, February, and March of 2018:
Record Date |  | Payment Date |  | Common Stock Distributions per Share |  | Series A Preferred Distributions per Share |  | Series B Preferred Distributions per Share |  | Series D Preferred Distributions per Share
January 22, 2018 |  | January 31, 2018 |  | $ | 0.125 |  |  | $ | 0.1614583 |  |  | $ | 0.15625 |  |  | $ | 0.1458333 |
February 16, 2018 |  | February 28, 2018 |  | 0.125 |  |  | 0.1614583 |  |  | 0.15625 |  |  | 0.1458333 |
March 20, 2018 |  | March 30, 2018 |  | 0.125 |  |  | 0.1614583 |  |  | 0.15625 |  |  | 0.1458333 |
|  |  |  | $ | 0.375 |  |  | $ | 0.4843749 |  |  | $ | 0.46875 |  |  | $ | 0.4374999 |
Senior Common Stock Distributions
Payable to the Holders of Record During the Month of: |  | Payment Date |  | Distribution per Share
January |  | February 7, 2018 |  | $ | 0.0875 |
February |  | March 7, 2018 |  | 0.0875 |
March |  | April 6, 2018 |  | 0.0875 |
|  |  |  | $ | 0.2625 |

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