CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Series A Redeemable Perpetual Preferred
Dividend rate (as a percent)	7.125%	7.125%
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Preferred stock, shares authorized (in shares)	4,600,000	4,600,000
Preferred stock, shares issued (in shares)	4,280,000	4,280,000
Preferred stock, shares outstanding (in shares)	4,280,000	4,280,000
Series B Convertible Preferred Units
Dividend rate (as a percent)	6.50%	6.50%
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference (in dollars per share)	$ 100.00	$ 100.00
Preferred stock, shares authorized (in shares)	3,162,500	3,162,500
Preferred stock, shares issued (in shares)	3,162,500	3,162,500
Preferred stock, shares outstanding (in shares)	3,162,500	3,162,500
Common stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	450,133,000	450,133,000
Common stock, shares issued (in shares)	64,580,118	58,227,523
Common stock, shares outstanding (in shares)	64,580,118	58,227,523