Condensed Consolidated Statement of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 19,783,000	$ 39,555,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	18,468,000	18,804,000
Amortization of debt premium	(37,000)	(126,000)
Stock-based compensation expense	413,000	390,000
Hurricane insurance recovery proceeds in excess of damaged property write-downs	(4,535,000)
Hurricane related expenses		3,398,000
Hurricane insurance recoveries		(3,398,000)
Gain on Arlington transaction		(27,196,000)
Changes in assets and liabilities:
Rent receivable	(707,000)	(913,000)
Accrued expenses and other liabilities	(179,000)	89,000
Tenant reserves, deposits and deferred and prepaid rents	1,184,000	3,527,000
Accrued interest	(93,000)	(6,000)
Leasing costs paid	(1,227,000)	(475,000)
Other, net	171,000	(22,000)
Net cash provided by operating activities	33,241,000	33,627,000
Cash flows from investing activities:
Investments in LLCs	(773,000)	(532,000)
Repayments of advances made to LLC		216,000
Cash distributions in excess of income from LLCs	773,000	1,060,000
Additions to real estate investments, net	(6,793,000)	(10,983,000)
Cash proceeds received from divestiture of property, net	0	65,220,000
Hurricane insurance recovery proceeds in excess of damaged property write-downs	4,535,000
Hurricane remediation payments	(192,000)
Hurricane insurance recoveries for damaged real estate property		1,500,000
Net cash paid for acquisition of property	(4,053,000)	(9,040,000)
Cash paid to acquire minority interests in majority-owned LLCs		(7,890,000)
Net cash (used in)/provided by investing activities	(6,503,000)	39,551,000
Cash flows from financing activities:
Net borrowings/(repayments) on line of credit	13,950,000	(24,800,000)
Repayments of mortgage notes payable	(22,964,000)	(43,656,000)
Proceeds from mortgage notes payable	13,000,000	13,200,000
Financing costs paid	(1,660,000)	(290,000)
Dividends paid	(27,552,000)	(26,921,000)
Issuance of shares of beneficial interest, net	173,000	9,307,000
Net cash used in financing activities	(25,053,000)	(73,160,000)
Increase in cash and cash equivalents	1,685,000	18,000
Cash and cash equivalents, beginning of period	3,387,000	3,930,000
Cash and cash equivalents, end of period	5,072,000	3,948,000
Supplemental disclosures of cash flow information:
Interest paid	$ 7,018,000	$ 7,359,000