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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) - $ / shares | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Series A Preferred Stock |  |  |
Preferred stock dividend rate (in dollars per share) |  | $ 1.74 | $ 3.49
Series B Preferred Stock |  |  |
Preferred stock dividend rate (in dollars per share) | $ 3.91 | $ 2.91 | $ 2.41

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- Details
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