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Equity and Accumulated Other Comprehensive Loss, Net (Schedule of Dividends) (Details) $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2018 USD ($) $ / shares
Series C Preferred Stock |
Dividends Payable [Line Items] |
Preferred stock dividend per share amount (in dollars per share) | $ / shares | $ 1.65625
Series C Preferred Stock | March 1, 2018 Installment |
Dividends Payable [Line Items] |
Dividends, preferred stock | $ | $ 3,333
Series G Preferred Stock |
Dividends Payable [Line Items] |
Preferred stock dividend per share amount (in dollars per share) | $ / shares | $ 1.46875
Series G Preferred Stock | March 1, 2018 Installment |
Dividends Payable [Line Items] |
Dividends, preferred stock | $ | $ 3,672
Series H Preferred Stock |
Dividends Payable [Line Items] |
Preferred stock dividend per share amount (in dollars per share) | $ / shares | $ 1.84375
Series H Preferred Stock | March 1, 2018 Installment |
Dividends Payable [Line Items] |
Dividends, preferred stock | $ | $ 6,730
Series I Preferred Stock |
Dividends Payable [Line Items] |
Preferred stock dividend per share amount (in dollars per share) | $ / shares | $ 1.5875
Series I Preferred Stock | March 1, 2018 Installment |
Dividends Payable [Line Items] |
Dividends, preferred stock | $ | $ 3,969
Series J Preferred Stock |
Dividends Payable [Line Items] |
Preferred stock dividend per share amount (in dollars per share) | $ / shares | $ 1.3125
Series J Preferred Stock | March 1, 2018 Installment |
Dividends Payable [Line Items] |
Dividends, preferred stock | $ | $ 2,625
Common Stock |
Dividends Payable [Line Items] |
Common stock dividend per share amount (in dollars per share) | $ / shares | $ 4.04
Common Stock | March 1, 2018 Installment |
Dividends Payable [Line Items] |
Dividends, common stock | $ | $ 208,015

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