Consolidated Statements Of Cash Flows - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
OPERATING ACTIVITIES
Net (loss) income	$ 9,937,000	$ (4,389,000)	$ (6,683,000)	$ 7,556,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Gain on sales				(7,099,000)
Impairment charges		9,850,000	21,396,000	9,850,000
Straight-line rents	(246,000)	(255,000)	(492,000)	(496,000)
Provision for doubtful accounts			1,002,000	762,000
Depreciation and amortization	10,541,000	9,953,000	20,595,000	20,371,000
Amortization of intangible lease liabilities, net	(2,213,000)	(636,000)	(2,882,000)	(1,275,000)
Expense relating to share-based compensation, net			1,837,000	1,833,000
Amortization of deferred financing costs			596,000	715,000
Changes in operating assets and liabilities, net of effects of acquisitions and dispositions:
Rents and other receivables			(1,895,000)	(1,466,000)
Prepaid expenses and other			(1,068,000)	103,000
Accounts payable and accrued liabilities			(1,767,000)	(696,000)
Net cash provided by operating activities			30,639,000	30,158,000
INVESTING ACTIVITIES
Acquisitions of real estate				(28,836,000)
Expenditures for real estate improvements			(14,016,000)	(9,037,000)
Net proceeds from sales of real estate				10,372,000
Net cash (used in) investing activities			(14,016,000)	(27,501,000)
FINANCING ACTIVITIES
Repayments under revolving credit facility			(16,500,000)	(25,500,000)
Advances under revolving credit facility			66,000,000	40,000,000
Mortgage repayments			(1,562,000)	(1,663,000)
Noncontrolling interests:
Distributions to limited partners			(34,000)	(36,000)
Redemptions of preferred stock			(50,016,000)
Common stock sales less issuance expenses, net			5,000	7,000
Preferred stock dividends			(5,900,000)	(7,204,000)
Distributions to common shareholders			(9,180,000)	(8,550,000)
Net cash (used in) financing activities			(17,187,000)	(2,946,000)
Net (decrease) in cash, cash equivalents and restricted cash			(564,000)	(289,000)
Cash, cash equivalents and restricted cash at beginning of year			7,219,000	5,762,000
Cash, cash equivalents and restricted cash at end of period	6,655,000	5,473,000	6,655,000	5,473,000
Reconciliation to consolidated balance sheets:
Cash and cash equivalents	1,625,000	2,937,000	1,625,000	2,937,000
Restricted cash	5,030,000	2,536,000	5,030,000	2,536,000
Cash, cash equivalents and restricted cash at end of period	$ 6,655,000	$ 5,473,000	$ 6,655,000	$ 5,473,000