Consolidated Statements Of Cash Flows	3 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)
OPERATING ACTIVITIES
Net (loss) income	$ 6,305,000	$ (378,000)	$ 13,973,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Gain on sales	(4,864,000)	(4,864,000)	(7,099,000)
Impairment charges		20,689,000	9,850,000
Early extinguishment of debt costs	4,829,000	4,829,000
Straight-line rents	(332,000)	(824,000)	(787,000)
Provision for doubtful accounts		1,662,000	1,215,000
Depreciation and amortization	9,650,000	30,245,000	30,178,000
Amortization of intangible lease liabilities, net	(729,000)	(3,611,000)	(1,900,000)
Expense relating to share-based compensation, net		2,801,000	2,693,000
Amortization of premium on mortgage loan payable		(80,000)	(97,000)
Amortization of deferred financing costs		913,000	1,040,000
Changes in operating assets and liabilities, net of effects of acquisitions and dispositions:
Rents and other receivables		(3,524,000)	(3,112,000)
Prepaid expenses and other		(9,207,000)	(6,395,000)
Accounts payable and accrued liabilities		1,326,000	1,826,000
Net cash provided by operating activities		39,977,000	41,385,000
INVESTING ACTIVITIES
Acquisitions of real estate		(179,000)	(32,442,000)
Expenditures for real estate improvements		(21,919,000)	(17,115,000)
Net proceeds from sales of real estate		19,118,000	10,372,000
Issuance of mortgage note receivable		(3,500,000)
Net cash (used in) investing activities		(6,480,000)	(39,185,000)
FINANCING ACTIVITIES
Repayments under revolving credit facility		(117,500,000)	(134,500,000)
Advances under revolving credit facility		164,500,000	157,500,000
Advance under term loan		75,000,000
Mortgage repayments		(80,077,000)	(2,399,000)
Payments of early extinguishment of debt costs		(5,159,000)
Payments of debt financing costs		(677,000)	(2,498,000)
Noncontrolling interests:
Distributions to limited partners		(62,000)	(53,000)
Redemption of OP Units		(7,000)	(11,000)
Net proceeds from sale of preferred stock			72,337,000
Redemptions of preferred stock		(50,016,000)	(112,510,000)
Common stock sales less issuance expenses, net		9,000	43,164,000
Preferred stock dividends		(8,588,000)	(11,113,000)
Distributions to common shareholders		(13,741,000)	(13,116,000)
Net cash (used in) financing activities		(36,318,000)	(3,199,000)
Net (decrease) in cash, cash equivalents and restricted cash		(2,821,000)	(999,000)
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	4,398,000	4,398,000	4,763,000
Reconciliation to consolidated balance sheets:
Cash and cash equivalents	4,398,000	4,398,000	2,240,000
Restricted cash			2,523,000
Cash, cash equivalents and restricted cash at end of period	$ 4,398,000	$ 4,398,000	$ 4,763,000