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Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2017
Preferred Stock |
Class of Stock [Line Items] |
Schedule of Dividends Declared | The following table presents the relevant dates with respect to quarterly cash dividends on the Series B Preferred Stock and Series C Preferred Stock declared from January 1, 2016 through September 30, 2017 :
| Series B Preferred Stock |  | Series C Preferred Stock
| Declaration Date |  | Record Date |  | Payment Date |  | Cash Dividend Per Share |  | Declaration Date |  | Record Date |  | Payment Date |  | Cash Dividend Per Share
| September 14, 2017 |  | October 1, 2017 |  | October 15, 2017 |  | $ | 0.484375 |  |  | September 14, 2017 |  | October 1, 2017 |  | October 15, 2017 |  | $ | 0.4921875 |
| June 14, 2017 |  | July 1, 2017 |  | July 15, 2017 |  | 0.484375 |  |  | June 14, 2017 |  | July 1, 2017 |  | July 15, 2017 |  | 0.4921875 |
| March 16, 2017 |  | April 1, 2017 |  | April 15, 2017 |  | 0.484375 |  |  | March 16, 2017 |  | April 1, 2017 |  | April 15, 2017 |  | 0.4921875 |
| December 15, 2016 |  | January 1, 2017 |  | January 15, 2017 |  | 0.484375 |  |  | December 15, 2016 |  | January 1, 2017 |  | January 15, 2017 |  | 0.4921875 |
| September 15, 2016 |  | October 1, 2016 |  | October 15, 2016 |  | 0.484375 |  |  | September 15, 2016 |  | October 1, 2016 |  | October 15, 2016 |  | 0.4921875 |
| June 16, 2016 |  | July 1, 2016 |  | July 15, 2016 |  | 0.484375 |  |  | June 16, 2016 |  | July 1, 2016 |  | July 15, 2016 |  | 0.4921875 |
| March 18, 2016 |  | April 1, 2016 |  | April 15, 2016 |  | 0.484375 |  |  | March 18, 2016 |  | April 1, 2016 |  | April 15, 2016 |  | 0.4921875 |
Common Stock |
Class of Stock [Line Items] |
Schedule of Dividends Declared | The following table presents cash dividends declared by the Company on its common stock with respect to each of the quarterly periods commencing January 1, 2016 and ended September 30, 2017:
Period |  | Declaration Date |  | Record Date |  | Payment Date |  | Cash Dividend Per Share
Third Quarter 2017 |  | September 14, 2017 |  | September 25, 2017 |  | October 25, 2017 |  | $ | 0.20 |
Second Quarter 2017 |  | June 14, 2017 |  | June 26, 2017 |  | July 25, 2017 |  | 0.20 |
First Quarter 2017 |  | March 16, 2017 |  | March 27, 2017 |  | April 25, 2017 |  | 0.20 |
Fourth Quarter 2016 |  | December 15, 2016 |  | December 27, 2016 |  | January 26, 2017 |  | 0.24 |
Third Quarter 2016 |  | September 15, 2016 |  | September 26, 2016 |  | October 28, 2016 |  | 0.24 |
Second Quarter 2016 |  | June 16, 2016 |  | June 27, 2016 |  | July 25, 2016 |  | 0.24 |
First Quarter 2016 |  | March 18, 2016 |  | March 28, 2016 |  | April 25, 2016 |  | 0.24 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Tabular disclosure of all or some of the information related to dividends declared, but not paid, as of the financial reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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