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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2012
Common Stock [Member] |
Stockholders' Equity | Dividends. During 2012 and 2011, the Company has declared the following dividends on its common stock:
Declaration Date |  | Record Date |  | Payment Date |  | Amount
March 10, 2011 |  | March 31, 2011 |  | April 12, 2011 |  | $0.40
May 10, 2011 |  | June 30, 2011 |  | July 12, 2011 |  | $0.40
August 4, 2011 |  | September 30, 2011 |  | October 12, 2011 |  | $0.40
November 3, 2011 |  | December 31, 2011 |  | January 12, 2012 |  | $0.40
February 28, 2012 |  | March 31, 2012 |  | April 12, 2012 |  | $0.40
May 3, 2012 |  | June 29, 2012 |  | July 12, 2012 |  | $0.40
August 6, 2012 |  | September 28, 2012 |  | October 12, 2012 |  | $0.40
November 1, 2012 |  | December 31, 2012 |  | January 14, 2013 |  | $0.40
Preferred Stock [Member] |
Stockholders' Equity | During 2012 and 2011, the Company declared the following dividends on its Series A Preferred Stock:
Declaration Date |  | Record Date |  |  | Payment Date |  |  | Amount |
September 13, 2012 |  |  | September 28, 2012 |  |  |  | October 15, 2012 |  |  | $ | 0.4432 | *
December 13, 2012 |  |  | December 31, 2012 |  |  |  | January 15, 2013 |  |  | $ | 0.5391 |
* | Partial payment for the period from the date of issuance (August 1, 2012) through October 15, 2012.

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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=6367179&loc=d3e4304-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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