Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES
Net income (loss)	$ 44,163,000	$ (45,003,000)	$ (520,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Gain on sales	(125,500,000)	(49,904,000)	(4,396,000)
Impairment charges	25,979,000	99,888,000	7,607,000
Straight-line rents and expenses, net	(506,000)	(161,000)	1,279,000
Provision for doubtful accounts	968,000	1,114,000	1,478,000
Depreciation and amortization	19,372,000	39,454,000	48,412,000
Amortization of intangible lease liabilities, net	(1,080,000)	(1,074,000)	(1,373,000)
Expense relating to share-based compensation, net	1,608,000	3,043,000	3,723,000
Amortization of deferred financing costs	6,105,000	1,360,000	1,331,000
Changes in operating assets and liabilities, net of effects of acquisitions and dispositions:
Rents and other receivables	(15,575,000)	(1,266,000)	(2,811,000)
Prepaid expenses and other	(5,654,000)	(2,709,000)	(9,216,000)
Accounts payable and accrued liabilities	29,656,000	220,000	(2,934,000)
Net cash (used in) provided by operating activities	(20,464,000)	44,962,000	42,580,000
INVESTING ACTIVITIES
Expenditures for real estate improvements	(22,407,000)	(28,309,000)	(39,551,000)
Net proceeds from sales of real estate	699,337,000	104,497,000	21,182,000
Contributions to unconsolidated joint venture	(155,000)	(4,654,000)
Net cash provided by (used in) investing activities	676,775,000	71,534,000	(18,369,000)
FINANCING ACTIVITIES
Repayments under revolving credit facility	(70,000,000)	(188,000,000)	(104,000,000)
Advances under revolving credit facility	4,000,000	79,000,000	173,000,000
Repayment of term note	(300,000,000)	(100,000,000)	(75,000,000)
Proceeds (termination payment) related to interest rate swap	3,400,000	(503,000)
Term loans and mortgage proceeds	265,000,000	114,000,000
Term loan and mortgage repayments	(130,664,000)	(1,110,000)	(1,067,000)
Payments of debt financing costs	(7,368,000)	(3,278,000)	(326,000)
Noncontrolling interests:
Purchase of minority interest		(276,000)
Distributions to limited partners	(966,000)	(20,000)	(42,000)
Acquisition of joint venture minority interest share	1,000,000
Redemption of OP units	(467,000)	(8,000)
Common stock sales less issuance expenses, net			13,000
Preferred stock dividends	(10,752,000)	(10,752,000)	(10,752,000)
Distributions to common shareholders	(397,300,000)	(3,917,000)	(7,147,000)
Net cash used in financing activities	(646,117,000)	(114,864,000)	(25,321,000)
Net increase (decrease) in cash, cash equivalents and restricted cash	10,194,000	1,632,000	(1,110,000)
Cash, cash equivalents and restricted cash at beginning of year	3,269,000	1,637,000	2,747,000
Cash, cash equivalents and restricted cash at end of year	13,463,000	3,269,000	1,637,000
Reconciliation to consolidated balance sheets:
Cash and cash equivalents	3,899,000	3,039,000	1,637,000
Restricted cash	9,564,000	230,000
Cash, cash equivalents and restricted cash at end of year	$ 13,463,000	$ 3,269,000	$ 1,637,000