Mezzanine Equity and Total Equity - Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended			3 Months Ended	6 Months Ended
	Jan. 31, 2021	Oct. 31, 2019	May 31, 2019	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Apr. 30, 2020
Class of Stock [Line Items]
Preferred stock, authorized (in shares)					50,000,000
7.50% Series A Cumulative Redeemable Perpetual Preferred Stock
Class of Stock [Line Items]
Preferred stock, authorized (in shares)					12,796,000		12,796,000
Preferred stock, par value (in dollars per share)					$ 0.01		$ 0.01
Preferred stock, issued (in shares)					7,933,711		7,933,711
Preferred stock, outstanding (in shares)					7,933,711		7,933,711
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, authorized (in shares)					120,000		120,000	1
Preferred stock, par value (in dollars per share)					$ 0.01		$ 0.01
Preferred stock, issued (in shares)					0		0
Preferred stock, outstanding (in shares)					0		0
7.375% Series C Cumulative Redeemable Perpetual Preferred Stock, $0.01 par value per share
Class of Stock [Line Items]
Preferred stock, authorized (in shares)					11,536,000		11,536,000
Preferred stock, par value (in dollars per share)					$ 0.01		$ 0.01
Preferred stock, issued (in shares)					4,595,175		4,594,498
Preferred stock, outstanding (in shares)					4,595,175		4,594,498
7.375% Series C Cumulative Redeemable Perpetual Preferred Stock, $0.01 par value per share | Series C Preferred Stock ATM Program
Class of Stock [Line Items]
Sale of stock, maximum offering amount	$ 200.0
Sale of stock, number of shares issued in transaction (in shares)				494,697		1,058,798
Gross consideration received				$ 12.3		$ 26.5
Sale of stock, consideration received on transaction (up to)				11.7		25.6
Commissions paid				$ 0.6		$ 0.9
Series A Cumulative Redeemable Perpetual Preferred Stock
Class of Stock [Line Items]
Preferred stock, issued (in shares)					7,933,711		7,933,711
Preferred stock, outstanding (in shares)					7,933,711		7,933,711
Series A Cumulative Redeemable Perpetual Preferred Stock | Series A Preferred Stock ATM Program
Class of Stock [Line Items]
Sale of stock, maximum offering amount	$ 200.0	$ 100.0	$ 50.0
Sale of stock, number of shares issued in transaction (in shares)					0	91,703
Gross consideration received						$ 2.3
Sale of stock, consideration received on transaction (up to)						2.2
Commissions paid						$ 0.1