Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ (12,915,000)	$ 4,191,000
Adjustments to reconcile net income or loss to net cash provided by operating activities:
Depreciation and amortization expense	51,823,000	45,830,000
Amortization of above and below market leases	(855,000)	82,000
Hedge ineffectiveness	151,000	(1,009,000)
(Gain) loss on sale of properties and properties held for sale, less applicable income tax	18,203,000	643,000
Equity in losses of non-consolidated REITs	598,000	372,000
Increase (decrease) in allowance for doubtful accounts	25,000	70,000
Changes in operating assets and liabilities:
Restricted cash	(55,000)	20,000
Tenant rent receivables	(1,618,000)	(440,000)
Straight-line rents	(1,897,000)	(1,975,000)
Lease acquisition costs	(318,000)	(252,000)
Prepaid expenses and other assets	(503,000)	(958,000)
Accounts payable, accrued expenses and other items	(6,829,000)	(7,776,000)
Accrued compensation	(1,855,000)	(1,398,000)
Tenant security deposits	12,000	(136,000)
Payment of deferred leasing commissions	(3,632,000)	(6,898,000)
Net cash provided by operating activities	40,033,000	32,384,000
Cash flows from investing activities:
Property acquisitions		(60,844,000)
Property improvements, fixtures and equipment	(28,415,000)	(10,870,000)
Office computers and furniture	(49,000)	(34,000)
Acquired real estate leases		(12,951,000)
Distributions in excess of earnings from non-consolidated REITs	691,000	359,000
Repayment of related party mortgage loan receivable	9,530,000	39,331,000
Proceeds received on sales of real estate assets	6,160,000	20,058,000
Net cash used in investing activities	(12,083,000)	(24,951,000)
Cash flows from financing activities:
Distributions to stockholders	(40,748,000)	(38,072,000)
Borrowings under bank note payable	40,000,000	95,000,000
Repayments of bank note payable	(25,000,000)	(75,000,000)
Net cash used in financing activities	(25,748,000)	(18,072,000)
Net increase (decrease) in cash and cash equivalents	2,202,000	(10,639,000)
Cash and cash equivalents, beginning of year	9,335,000	18,163,000
Cash and cash equivalents, end of period	11,537,000	7,524,000
Non-cash investing and financing activities:
Accrued costs for purchase of real estate assets	$ 10,041,000	$ 2,838,000