CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	23,263,130	22,423,283
Common stock, shares outstanding	23,263,130	22,423,283
Series A Preferred Stock [Member]
Preferred stock, dividend rate	7.00%	7.00%
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	300,000	300,000
Preferred stock, shares issued	139,875	133,500
Preferred stock, shares outstanding	139,875	133,500
Preferred stock, liquidation preference, value	$ 139.9	$ 133.5
Series B Preferred Stock [Member]
Preferred stock, dividend rate	7.00%	7.00%
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	3,750,000	3,750,000
Preferred stock, shares issued	1,571,734	1,571,734
Preferred stock, shares outstanding	1,571,734	1,571,734
Preferred stock, liquidation preference, value	$ 39.3	$ 39.3