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v3.20.2

Equity (Terms of Outstanding Preferred Stock) (Details) |  | 4 Months Ended | 7 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Nov. 01, 2016 shares | May 07, 2013 shares | Apr. 24, 2012 shares | Jul. 27, 2011 shares | Oct. 09, 2012 shares | Sep. 21, 2012 shares | Dec. 31, 2019 voting_right $ / shares
Series B Preferred Stock |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Per-Dollar-Amount | $ / shares |  |  |  |  |  |  | $ 1.8
Preferred stock, voting rights | voting_right |  |  |  |  |  |  | 8
Series O Preferred Stock |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  | 6.75% |  |  |
Depositary Shares |  |  |  | 1,000,000 |  |  |
Interest In Preferred Stock |  |  |  | 1.00% |  |  |
Series P Preferred Stock |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  | 6.125% |  |  |  |
Depositary Shares |  |  | 60,000,000 |  |  |  |
Interest In Preferred Stock |  |  | 0.025% |  |  |  |
Series Q Preferred Stock |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  |  |  |  | 5.375% | 5.375% |
Depositary Shares |  |  |  |  | 1,200,000 | 18,000,000 |
Interest In Preferred Stock |  |  |  |  | 0.025% | 0.025% |
Series R Preferred Stock |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  | 4.85% |  |  |  |  |
Depositary Shares |  | 500,000 |  |  |  |  |
Interest In Preferred Stock |  | 1.00% |  |  |  |  |
Series S Preferred Stock |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage | 5.00% |  |  |  |  |  |
Depositary Shares | 525,000 |  |  |  |  |  |
Interest In Preferred Stock | 1.00% |  |  |  |  |  |
3-month LIBOR | Series O Preferred Stock |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate - LIBOR Plus |  |  |  | 3.678% |  |  |
3-month LIBOR | Series P Preferred Stock |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate - LIBOR Plus |  |  | 4.0675% |  |  |  |
3-month LIBOR | Series R Preferred Stock |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate - LIBOR Plus |  | 3.04% |  |  |  |  |
3-month LIBOR | Series S Preferred Stock |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate - LIBOR Plus | 3.30% |  |  |  |  |  |

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