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CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Common stock cash distributions (in dollars per share) | $ 0.465 | $ 0.455 | $ 0.435 | $ 0.435 | $ 0.42 | $ 0.42 | $ 0.42 | $ 0.42 | $ 1.79 | $ 1.68 | $ 1.58
Series E Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Conversion of preferred stock, partial and full redemption (as a percent) |  |  |  |  |  |  |  |  |  |  | 8.50%
Series F Preferred Stock |  |  |  |  |  |  |  |  |  |  |
Conversion of preferred stock, partial and full redemption (as a percent) |  |  |  |  |  |  |  |  |  | 8.00% | 8.00%

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 + Details
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- Definition The percentage rate used to calculate dividend payments on preferred stock. + References No definition available. + Details
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