Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Feb. 15, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	50,000,000			50,000,000			50,000,000
Preferred Stock, Shares Outstanding	4,460,000			4,460,000			7,248,330
Preferred stock redemption charge	$ 0		$ 0	$ 2,987	$ 3,914
Share-based compensation expense	$ 544		$ 424	995	731
Stock issuance costs				$ 313	$ 0
ATM Offering
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)	3,463,708
Consideration received on transaction	$ 68,303
Stock issuance costs	$ 865
Series C Preferred Stock
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	6,600,000			6,600,000
Preferred Stock, Shares Outstanding	4,460,000			4,460,000
Preferred Stock, Liquidation Preference Per Share	$ 25.00			$ 25.00
Preferred Stock, Dividend Payment Terms				The Series C Preferred stock pays a cumulative cash dividend equivalent to 6.900% of the $25.00 liquidation preference per share each year until April 15, 2025 upon which date and thereafter, the Company will pay cumulative cash dividends at a percentage of the $25.00 liquidation value per share equal to an annual floating rate of three-month LIBOR plus a spread of 5.461%.
Preferred Stock, Dividends Per Share, Declared	$ 0.43125
Series B Preferred Stock
Class of Stock [Line Items]
Stock Redeemed or Called During Period, Shares		2,788,330
Preferred Stock, Dividend Rate, Percentage		7.625%
Preferred Stock, Redemption Price Per Share						$ 25.15
Preferred stock redemption charge				$ 2,987