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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016
Series A Preferred Stock |  |
Preferred stock dividend rate (in dollars per share) | $ 1.74 | $ 0.87
Series B Preferred Stock |  |
Preferred stock dividend rate (in dollars per share) | $ 2.15 | $ 0.65

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- Details
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