Quarterly Results (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended								12 Months Ended
	Aug. 16, 2016	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Revenue		$ 10,595	$ 11,393	$ 11,693	$ 12,450	$ 11,618	$ 12,539	$ 12,779	$ 13,314	$ 46,131	$ 50,250	$ 48,597
Income (loss) from continuing operations		(2,223)	9,324	(1,226)	(967)	(3,900)	13,117	(1,878)	338
Add: Net (income)/loss attributable to noncontrolling interest		21	59	61	(106)	156	(262)	(82)	(511)	35	(699)	331
Net income (loss) attributable to the Company		$ (2,202)	$ 9,383	$ (1,165)	$ (1,073)	$ (3,744)	$ 12,855	$ (1,960)	$ (173)	$ 4,943	$ 6,978	$ (3)
Basic and diluted weighted average shares outstanding (in shares)		25,266	25,391	25,466	25,553	25,607	25,667	25,704	25,776	25,418	25,688	25,943
Basic and diluted income per share (in dollars per share)		$ (0.09)	$ 0.37	$ (0.05)	$ (0.04)	$ (0.15)	$ 0.50	$ (0.07)	$ (0.01)	$ 0.19	$ 0.27	$ 0.00
Real Estate Properties [Line Items]
Gain on sale of real estate										$ 11,341	$ 22,771	$ 11,454
Impairment charge										$ 0	$ 1,417	$ 0
Lakewood Flats
Real Estate Properties [Line Items]
Gain on sale of real estate	$ 11,500		$ 11,500
Babcock and AJS
Real Estate Properties [Line Items]
Gain on sale of real estate									$ 5,300
Holstenplatz and Wimberly
Real Estate Properties [Line Items]
Gain on sale of real estate							$ 17,500