Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings (Deficit) [Member]	Non-Controlling Interest in Operating Partnership [Member]	Total	Series A Preferred Stock [Member] Common Stock [Member]	Series A Preferred Stock [Member] Preferred Stock [Member]	Series A Preferred Stock [Member] Additional Paid-in Capital [Member]	Series A Preferred Stock [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Series A Preferred Stock [Member] Retained Earnings (Deficit) [Member]	Series A Preferred Stock [Member] Non-Controlling Interest in Operating Partnership [Member]	Series A Preferred Stock [Member]	Series B Preferred Stock [Member] Common Stock [Member]	Series B Preferred Stock [Member] Preferred Stock [Member]	Series B Preferred Stock [Member] Additional Paid-in Capital [Member]	Series B Preferred Stock [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Series B Preferred Stock [Member] Retained Earnings (Deficit) [Member]	Series B Preferred Stock [Member] Non-Controlling Interest in Operating Partnership [Member]	Series B Preferred Stock [Member]
Beginning balance at Dec. 31, 2017	$ 127	$ 57,917	$ 229,642	$ (2,942)	$ 35,238	$ 2,475	$ 322,457
Beginning balance (in shares) at Dec. 31, 2017	12,721,464	2,400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	$ 0	$ 0	37	0	0	0	37
Issuance of common stock (in shares)	0	0
Net Income (Loss) before dividends on preferred stock	$ 0	$ 0	0	0	34,783	456	35,239
Other Comprehensive (Loss)	0	0	0	(31,043)	0	0	(31,043)
LTIP-OP Unit awards	0	0	0	0	0	138	138
Distribution paid on LTIP-OP Units	0	0	0	0	0	(83)	(83)
Common dividends declared	0	0	0	0	(6,235)	0	(6,235)
Preferred dividends declared								$ 0	$ 0	$ 0	$ 0	$ (1,213)	$ 0	$ (1,213)
Ending balance at Mar. 31, 2018	$ 127	$ 57,917	229,679	(33,985)	62,573	2,986	319,297
Ending balance (in shares) at Mar. 31, 2018	12,721,464	2,400,000
Beginning balance at Dec. 31, 2017	$ 127	$ 57,917	229,642	(2,942)	35,238	2,475	322,457
Beginning balance (in shares) at Dec. 31, 2017	12,721,464	2,400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) before dividends on preferred stock							76,583
Ending balance at Sep. 30, 2018	$ 162	$ 64,510	289,981	(55,194)	85,012	3,698	388,169
Ending balance (in shares) at Sep. 30, 2018	16,189,618	2,671,782
Beginning balance at Mar. 31, 2018	$ 127	$ 57,917	229,679	(33,985)	62,573	2,986	319,297
Beginning balance (in shares) at Mar. 31, 2018	12,721,464	2,400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	$ 31	$ 0	53,551	0	0	0	53,582
Issuance of common stock (in shares)	3,097,113	0
Issuance of preferred stock	$ 0	$ 3,981	0	0	0	0	3,981
Issuance of preferred stock (in shares)	0	168,212
Net Income (Loss) before dividends on preferred stock	$ 0	$ 0	0	0	13,672	173	13,845
Other Comprehensive (Loss)	0	0	0	(7,981)	0	0	(7,981)
LTIP-OP Unit awards	0	0	0	0	0	162	162
Distribution paid on LTIP-OP Units	0	0	0	0	0	(72)	(72)
Common dividends declared	0	0	0	0	(7,759)	0	(7,759)
Preferred dividends declared								0	0	0	0	(1,317)	0	(1,317)
Ending balance at Jun. 30, 2018	$ 158	$ 61,898	283,230	(41,966)	67,169	3,249	373,738
Ending balance (in shares) at Jun. 30, 2018	15,818,577	2,568,212
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	$ 4	$ 0	6,751	0	0	0	6,755
Issuance of common stock (in shares)	371,041	0
Issuance of preferred stock	$ 0	$ 2,612	0	0	0	0	2,612
Issuance of preferred stock (in shares)	0	103,570
Net Income (Loss) before dividends on preferred stock	$ 0	$ 0	0	0	27,135	364	27,499
Other Comprehensive (Loss)	0	0	0	(13,228)	0	0	(13,228)
LTIP-OP Unit awards	0	0	0	0	0	194	194
Distribution paid on LTIP-OP Units	0	0	0	0	0	(109)	(109)
Common dividends declared	0	0	0	0	(7,920)	0	(7,920)
Preferred dividends declared								0	0	0	0	(1,372)	0	(1,372)
Ending balance at Sep. 30, 2018	$ 162	$ 64,510	289,981	(55,194)	85,012	3,698	388,169
Ending balance (in shares) at Sep. 30, 2018	16,189,618	2,671,782
Beginning balance at Dec. 31, 2018	$ 167	$ 65,639	298,614	(38,400)	34,653	3,258	$ 363,931
Beginning balance (in shares) at Dec. 31, 2018	16,652,170	2,718,206					16,652,170
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	$ 0	$ 0	132	0	0	0	$ 132
Issuance of common stock (in shares)	6,000	0
Issuance of preferred stock	$ 0	$ 49,360	0	0	0	0	49,360
Issuance of preferred stock (in shares)	0	2,049,480
Conversion of OP units	$ 0	$ 0	0	0	0	(103)	(103)
Net Income (Loss) before dividends on preferred stock	0	0	0	0	(20,789)	(349)	(21,138)
Other Comprehensive (Loss)	0	0	0	31,981	0	0	31,981
LTIP-OP Unit awards	0	0	0	0	0	266	266
Distribution paid on LTIP-OP Units	0	0	0	0	0	(134)	(134)
Common dividends declared	0	0	0	0	(8,156)	0	(8,156)
Preferred dividends declared								0	0	0	0	(1,419)	0	(1,419)	$ 0	$ 0	$ 0	$ 0	$ (422)	$ 0	$ (422)
Ending balance at Mar. 31, 2019	$ 167	$ 114,999	298,746	(6,419)	3,867	2,938	414,298
Ending balance (in shares) at Mar. 31, 2019	16,658,170	4,767,686
Beginning balance at Dec. 31, 2018	$ 167	$ 65,639	298,614	(38,400)	34,653	3,258	$ 363,931
Beginning balance (in shares) at Dec. 31, 2018	16,652,170	2,718,206					16,652,170
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) before dividends on preferred stock							$ (51,247)
Ending balance at Sep. 30, 2019	$ 170	$ 115,281	302,684	34,668	(45,860)	2,664	$ 409,607
Ending balance (in shares) at Sep. 30, 2019	16,896,605	4,781,635					16,896,605
Beginning balance at Mar. 31, 2019	$ 167	$ 114,999	298,746	(6,419)	3,867	2,938	$ 414,298
Beginning balance (in shares) at Mar. 31, 2019	16,658,170	4,767,686
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	$ 3	$ 0	3,885	0	0	0	3,888
Issuance of common stock (in shares)	238,435	0
Issuance of preferred stock	$ 0	$ 282	0	0	0	0	282
Issuance of preferred stock (in shares)	0	13,949
Net Income (Loss) before dividends on preferred stock	$ 0	$ 0	0	0	(26,720)	(438)	(27,158)
Other Comprehensive (Loss)	0	0	0	25,536	0	0	25,536
LTIP-OP Unit awards	0	0	0	0	0	250	250
Distribution paid on LTIP-OP Units	0	0	0	0	0	(135)	(135)
Common dividends declared	0	0	0	0	(8,289)	0	(8,289)
Preferred dividends declared								0	0	0	0	(1,428)	0	(1,428)	0	0	0	0	(1,164)	0	(1,164)
Ending balance at Jun. 30, 2019	$ 170	$ 115,281	302,631	19,117	(33,734)	2,615	406,080
Ending balance (in shares) at Jun. 30, 2019	16,896,605	4,781,635
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	$ 0	$ 0	53	0	0	0	53
Issuance of common stock (in shares)	0	0
Issuance of preferred stock	$ 0	$ 0	0	0	0	0	0
Issuance of preferred stock (in shares)	0	0
Net Income (Loss) before dividends on preferred stock	$ 0	$ 0	0	0	(2,908)	(43)	(2,951)
Other Comprehensive (Loss)	0	0	0	15,551	0	0	15,551
LTIP-OP Unit awards	0	0	0	0	0	225	225
Distribution paid on LTIP-OP Units	0	0	0	0	0	(133)	(133)
Common dividends declared	0	0	0	0	(6,759)	0	(6,759)
Preferred dividends declared								$ 0	$ 0	$ 0	$ 0	$ (1,428)	$ 0	$ (1,428)	$ 0	$ 0	$ 0	$ 0	$ (1,031)	$ 0	$ (1,031)
Ending balance at Sep. 30, 2019	$ 170	$ 115,281	$ 302,684	$ 34,668	$ (45,860)	$ 2,664	$ 409,607
Ending balance (in shares) at Sep. 30, 2019	16,896,605	4,781,635					16,896,605