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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - $ / shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Series D Preferred Stock |  |  |  |
Dividends declared per preferred share (in dollars per share) | $ 0.52 | $ 0.52 | $ 1.03 | $ 1.03
Preferred stock dividend rate | 8.25% | 8.25% | 8.25% | 8.25%
Series B Preferred Stock |  |  |  |
Dividends declared per preferred share (in dollars per share) | $ 0.34 | $ 0.34 | $ 0.69 | $ 0.69
Preferred stock dividend rate | 5.50% | 5.50% | 5.50% | 5.50%

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- Definition The percentage rate used to calculate dividend payments on preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
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