CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	61,615,362	61,228,579
Common stock, shares outstanding	61,615,362	61,228,579
Series B Preferred Stock [Member]
Preferred Stock, par value	$ 0.001	$ 0.001
Preferred Stock, liquidation preference per share	$ 0.001	$ 0.001
Preferred Stock, shares authorized	40,000,000	40,000,000
Preferred Stock, shares issued	26,079,064	26,398,473
Preferred Stock, shares outstanding	26,079,064	26,398,473
Series J Preferred Stock [Member]
Preferred Stock, par value	$ 0	$ 0
Preferred Stock, liquidation preference	$ 192,500,000	$ 192,500,000
Preferred Stock, liquidation preference per share	$ 25
Preferred Stock, shares authorized	7,700,000	7,700,000
Preferred Stock, shares issued	7,700,000	7,700,000
Preferred Stock, shares outstanding	7,700,000	7,700,000
Series K Preferred Stock [Member]
Preferred Stock, par value	$ 0	$ 0
Preferred Stock, liquidation preference	$ 170,000,000	$ 170,000,000
Preferred Stock, liquidation preference per share	$ 25
Preferred Stock, shares authorized	6,800,000	6,800,000
Preferred Stock, shares issued	6,800,000	6,800,000
Preferred Stock, shares outstanding	6,800,000	6,800,000