CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Preferred stock, authorized (in shares)	30,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	250,000,000	250,000,000
Common stock, issued (in shares)	89,482,576	89,458,752
Common stock, outstanding (in shares)	89,482,576	89,458,752
Series A Preferred Stock
Preferred stock, dividend rate	7.25%	7.25%
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference (in dollars per share)	$ 25.00	$ 25
Preferred stock, authorized (in shares)	9,959,650	9,959,650
Preferred stock, issued (in shares)	6,799,467	6,799,467
Preferred stock, outstanding (in shares)	6,799,467	6,799,467
Series B Preferred Stock
Preferred stock, dividend rate	6.875%	6.875%
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, liquidation preference (in dollars per share)	$ 25	$ 25
Preferred stock, authorized (in shares)	11,450,000	11,450,000
Preferred stock, issued (in shares)	3,450,000	3,450,000
Preferred stock, outstanding (in shares)	3,450,000	3,450,000