CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Rental revenues	$ 0	$ 0	$ 0
Total revenues	0	0	0
Operating expenses:
Rental expenses	0	0	0
Real estate-related depreciation and amortization	0	0	0
General and administrative expenses	9,492	9,557	9,191
Asset management fees, related party	1,068	1,605	507
Total operating expenses	10,560	11,162	9,698
Other (income) expense:
Equity in income of unconsolidated joint venture partnerships	(4,140)	(8,736)	(1,479)
Other expense	108	74	30
Net gain on disposition of real estate properties	(6,083)	(3,550)	(44)
Total other income	(10,115)	(12,212)	(1,493)
(Loss) income from continuing operations	(445)	1,050	(8,205)
Income (loss) from discontinued operations	12,510	(7,887)	(10,027)
Net income (loss)	12,065	(6,837)	(18,232)
Net income attributable to noncontrolling interests	0	0	(85)
Net income (loss) attributable to common shareholders	$ 12,065	$ (6,837)	$ (18,317)
Weighted-average shares outstanding (in shares)	177,663	176,283	169,270
Net income (loss) per common share - basic and diluted
Continuing operations - basic and diluted (in dollars per share)	$ 0.00	$ 0.01	$ (0.05)
Discontinued Operations - basic and diluted (in dollars per share)	0.07	(0.05)	(0.06)
Net income (loss) per common share - basic and diluted (in dollars per share)	$ 0.07	$ (0.04)	$ (0.11)