CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,050,000	10,050,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	489,950,000	489,950,000
Common stock, shares outstanding (in shares)	123,788,591	113,793,300
5.875% Series A Cumulative Redeemable Preferred Stock
Preferred Stock, Dividend Rate, Percentage	5.875%	5.875%
Preferred stock, shares outstanding (in shares)	3,600,000	3,600,000
Preferred Stock, Liquidation Preference, Value	$ 90,000	$ 90,000
5.875% Series B Cumulative Redeemable Preferred Stock
Preferred Stock, Dividend Rate, Percentage	5.875%	5.875%
Preferred stock, shares outstanding (in shares)	3,000,000	3,000,000
Preferred Stock, Liquidation Preference, Value	$ 75,000	$ 75,000
5.625% Series C Cumulative Redeemable Preferred Stock
Preferred Stock, Dividend Rate, Percentage	5.625%	5.625%
Preferred stock, shares outstanding (in shares)	3,450,000	3,450,000
Preferred Stock, Liquidation Preference, Value	$ 86,250	$ 86,250