Consolidated Statements of Cash Flows - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
OPERATING ACTIVITIES
Net income (loss)	$ 51,464,000	$ (6,009,000)	$ 52,717,000	$ (8,107,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Gain on sales	(48,857,000)		(49,904,000)
Impairment (reversal) charges	(1,849,000)	133,000	(1,849,000)	7,607,000
Straight-line rents and expenses, net			(305,000)	1,000,000
Provision for doubtful accounts			502,000	641,000
Depreciation and amortization	10,257,000	14,426,000	21,468,000	28,173,000
Amortization of intangible lease liabilities, net	(263,000)	(307,000)	(539,000)	(766,000)
Expense relating to share-based compensation, net			1,926,000	1,986,000
Amortization of deferred financing costs			748,000	617,000
Changes in operating assets and liabilities, net of effects of acquisitions and dispositions:
Rents and other receivables			(591,000)	(2,635,000)
Prepaid expenses and other			1,276,000	(40,000)
Accounts payable and accrued liabilities			(645,000)	(3,958,000)
Net cash provided by operating activities			24,804,000	24,518,000
INVESTING ACTIVITIES
Expenditures for real estate improvements			(13,762,000)	(18,644,000)
Net proceeds from sales of real estate			104,497,000
Contributions to unconsolidated joint venture			(2,481,000)
Net cash provided by (used in) investing activities			88,254,000	(18,644,000)
FINANCING ACTIVITIES
Repayments under revolving credit facility			(183,000,000)	(12,100,000)
Advances under revolving credit facility			20,000,000	83,000,000
Repayment of term note			(50,000,000)
Termination payment related to interest rate swap			(503,000)
Mortgage proceeds			114,000,000
Mortgage repayments			(548,000)	(528,000)
Payments of debt financing costs			(1,620,000)
Noncontrolling interests:
Distributions to limited partners			(10,000)	(32,000)
Redemption of OP units			(8,000)
Common stock sales less issuance expenses, net			2,000	9,000
Preferred stock dividends			(5,376,000)	(5,376,000)
Distributions to common shareholders			(1,799,000)	(5,361,000)
Net cash (used in) provided by financing activities			(108,862,000)	59,612,000
Net increase in cash, cash equivalents and restricted cash			4,196,000	65,486,000
Cash, cash equivalents and restricted cash at beginning of year			1,637,000	2,747,000
Cash, cash equivalents and restricted cash at end of year	5,833,000	68,233,000	5,833,000	68,233,000
Reconciliation to consolidated balance sheets:
Cash and cash equivalents	5,603,000	68,233,000	5,603,000	68,233,000
Restricted cash	230,000		230,000
Cash, cash equivalents and restricted cash at end of year	$ 5,833,000	$ 68,233,000	$ 5,833,000	$ 68,233,000