Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Preferred Stock [Member] Series B Preferred Stock [Member]	Preferred Stock [Member] Series C Preferred Stock [Member]	Preferred Stock [Member] Series D Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2018	$ 3,832	$ 95,030	$ 143,750	$ 50,000	$ 157,450	$ (25,364)	$ 424,698
Beginning balance, shares at Dec. 31, 2018	38,320
Common Stock Issued with the DRIP	$ 247	0	0	0	31,256	0	31,503
Common Stock Issued with the DRIP, shares	2,468
Common Stock Issued through Restricted/ Unrestricted Stock Awards	$ 12	0	0	0	(12)	0	0
Common Stock Issued through Restricted/ Unrestricted Stock Awards, shares	122
Common Stock Issued through Stock Options	$ 24	0	0	0	2,579	0	2,603
Common Stock Issued through Stock Options, shares	240
Repurchase of Common Stock	$ (2)	0	0	0	(235)	0	(237)
Repurchase of Common Stock, shares	(20)
Preferred Stock Issued through Underwritten Registered Public Offering, net	$ 0	0	100,000	0	(3,312)	0	96,688
Preferred Stock Issued in connection with At-The-Market Offerings, net	0	0	0	16,268	(337)	0	15,931
Distributions	0	0	0	0	(26,786)	(27,750)	(54,536)
Stock Compensation Expense	0	0	0	0	1,939	0	1,939
Net Income	0	0	0	0	0	27,750	27,750
Ending balance, value at Dec. 31, 2019	$ 4,113	95,030	243,750	66,268	162,542	(25,364)	546,339
Ending balance, shares at Dec. 31, 2019	41,130
Common Stock Issued with the DRIP	$ 72	0	0	0	9,082	0	9,154
Common Stock Issued with the DRIP, shares	720
Common Stock Issued through Restricted/ Unrestricted Stock Awards	$ 5	0	0	0	(5)	0	0
Common Stock Issued through Restricted/ Unrestricted Stock Awards, shares	46
Common Stock Issued through Stock Options	$ 6	0	0	0	653	0	659
Common Stock Issued through Stock Options, shares	63
Common Stock Issued in connection with At-The-Market Offerings, net	$ 13	0	0	0	1,730	0	1,743
Common Stock Issued in connection with At-The-Market Offerings, net, shares	135
Repurchase of Common Stock	$ (17)	0	0	0	(1,813)	0	(1,830)
Repurchase of Common Stock, shares	(174)
Repurchase of Preferred Stock	$ 0	(13)	0	0	1	0	(12)
Preferred Stock Issued in connection with At-The-Market Offerings, net	0	0	3,350	94,586	(1,795)	0	96,141
Redemption of Preferred Stock	0	(95,017)	0	0	2,871	(2,871)	(95,017)
Distributions	0	0	0	0	(59,567)	(2,184)	(61,751)
Stock Compensation Expense	0	0	0	0	1,327	0	1,327
Net Income	0	0	0	0	0	5,055	5,055
Ending balance, value at Dec. 31, 2020	$ 4,192	0	247,100	160,854	115,026	(25,364)	501,808
Ending balance, shares at Dec. 31, 2020	41,920
Common Stock Issued with the DRIP	$ 50	0	0	0	9,723	0	9,773
Common Stock Issued with the DRIP, shares	503
Common Stock Issued through Restricted/ Unrestricted Stock Awards	$ 30	0	0	0	(30)	0	0
Common Stock Issued through Restricted/ Unrestricted Stock Awards, shares	297
Common Stock Issued through Stock Options	$ 71	0	0	0	8,530	0	8,601
Common Stock Issued through Stock Options, shares	710
Common Stock Issued in connection with At-The-Market Offerings, net	$ 822	0	0	0	178,247	0	179,069
Common Stock Issued in connection with At-The-Market Offerings, net, shares	8,221
Preferred Stock Issued in connection with At-The-Market Offerings, net	$ 0	0	0	54,365	(1,152)	0	53,213
Distributions	0	0	0	0	(13,771)	(51,088)	(64,859)
Stock Compensation Expense	0	0	0	0	3,447	0	3,447
Net Income	0	0	0	0	0	51,088	51,088
Ending balance, value at Dec. 31, 2021	$ 5,165	$ 0	$ 247,100	$ 215,219	$ 300,020	$ (25,364)	$ 742,140
Ending balance, shares at Dec. 31, 2021	51,651