CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Total Stockholders' Equity	Total Stockholders' Equity Cumulative Effect, Period of Adoption, Adjustment	Common stock	Treasury stock	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Accumulated other comprehensive income/(loss)	Non-controlling Interest	Preferred stock - Series A shares Preferred Stock	Preferred stock - Series B shares Preferred Stock
Beginning balance (in shares) at Dec. 31, 2020					22,978,339							2,307,400	2,892,600
Beginning balance at Dec. 31, 2020	$ 514,491		$ 485,361		$ 231	$ (1,159)	$ 317,424		$ 53,346	$ 375	$ 29,130	$ 51,100	$ 64,044
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,642		8,953						8,953		1,689
Issuance of shares under dividend reinvestment plan (in shares)					4,228
Issuance of shares under dividend reinvestment plan	47		47				47
Acquisition of non-controlling interest in subsidiary	(11,362)		(3,056)				(3,056)				(8,306)
Stock based compensation expense (in shares)					6,280
Stock-based compensation expense	294		294				294
Dividends declared and distributions	(5,883)		(5,799)						(5,799)		(84)
Other comprehensive income/(loss)	1,306		1,306							1,306
Ending balance (in shares) at Mar. 31, 2021					22,988,847							2,307,400	2,892,600
Ending balance at Mar. 31, 2021	509,535		487,106		$ 231	(1,159)	314,709		56,500	1,681	22,429	$ 51,100	$ 64,044
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclass of conversion premium - convertible notes	497,295	$ (711)		$ (711)				$ (711)
Beginning balance (in shares) at Dec. 31, 2021					23,146,775							2,307,400	2,892,600
Beginning balance at Dec. 31, 2021	500,473		497,295		$ 233	(1,691)	316,162		66,427	1,020	3,178	$ 51,100	$ 64,044
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,631		5,535						5,535		96
Issuance of shares under dividend reinvestment plan (in shares)					9,739
Issuance of shares under dividend reinvestment plan	115		115				115
Distribution to non-controlling interest	(819)										(819)
Stock-based management fee expense (in shares)					39,558
Stock-based management fee expense	437		437		$ 1		436
Stock based compensation expense (in shares)					8,900
Stock-based compensation expense	324		324				324
Dividends declared and distributions	(8,056)		(7,966)						(7,966)		(90)
Other comprehensive income/(loss)	(9,778)		(9,778)							(9,778)
Treasury stock (in shares)					(10,406)
Treasury stock	(117)		(117)			(117)
Ending balance (in shares) at Mar. 31, 2022					23,194,566							2,307,400	2,892,600
Ending balance at Mar. 31, 2022	487,499		$ 485,134		$ 234	$ (1,808)	$ 316,326		$ 63,996	$ (8,758)	$ 2,365	$ 51,100	$ 64,044
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclass of conversion premium - convertible notes	$ 485,134