CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 2,936	$ (4,160)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	30,333	28,576
Distributions of operating income from unconsolidated affiliates	2,054	4,724
Equity in earnings and gains of unconsolidated affiliates	(2,271)	(1,684)
Stock compensation expense	3,454	3,809
Amortization of financing costs	1,743	1,375
Gain on disposition of properties	(2,014)
Other, net	(6,614)	(1,889)
Changes in assets and liabilities:
Other liabilities	(7,068)	1,461
Prepaid expenses and other assets	(390)	(2,240)
Rents receivable, net	2,283	(2,359)
Accounts payable and accrued expenses	(4,661)	(4,674)
Net cash provided by operating activities	19,785	22,939
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of real estate	(32,034)	(46,171)
Development, construction and property improvement costs	(19,909)	(18,136)
Issuance of or advances on notes receivable		(2,951)
Proceeds from the disposition of properties, net	9,779
Investments in and advances to unconsolidated affiliates	(48,983)	(1,847)
Return of capital from unconsolidated affiliates and other	1,635	16,210
Proceeds from notes receivable		26,000
(Payment) return of deposits for properties under contract	(1,952)	1,750
Payment of deferred leasing costs	(1,549)	(1,134)
Net cash used in investing activities	(93,013)	(26,279)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on mortgage and other notes	(8,014)	(45,246)
Principal payments on unsecured debt	(124,140)	(420,500)
Proceeds received on mortgage and other notes	101,655	47,273
Proceeds from unsecured debt	80,940	447,800
Payments for repurchase of Common Shares		(31,961)
Payments of finance lease obligations	(625)
Proceeds from the sale of Common Stock	27,834
Capital contributions from noncontrolling interests	32,191
Distributions to noncontrolling interests	(4,999)	(2,411)
Dividends paid to Common Shareholders	(22,836)	(22,601)
Deferred financing and other costs	(3,334)	(2,822)
Net cash provided by (used in) financing activities	78,672	(30,468)
Increase (decrease) in cash and restricted cash	5,444	(33,808)
Cash of $21,268 and $74,823 and restricted cash of $13,580 and $10,846, respectively, beginning of period	34,848	85,669	$ 85,669
Cash of $27,765 and $39,344 and restricted cash of $12,527 and $12,517, respectively, end of period	40,292	51,861	$ 34,848
Supplemental disclosure of cash flow information
Cash paid during the period for interest, net of capitalized interest of $2,575 and $1,492 respectively	16,898	11,910
Cash paid for income taxes, net of refunds	113	673
Supplemental disclosure of non-cash investing activities
Assumption of accounts payable and accrued expenses through acquisition of real estate	159	425
Right-of-use assets, finance leases obtained in exchange for finance lease liabilities	5,664
Right-of-use assets, finance leases obtained in exchange for assets under capital lease	76,965
Right-of-use assets, operating leases obtained in exchange for operating lease liabilities	11,871
Capital lease obligation exchanged for finance lease liability	71,111
Other liabilities exchanged for operating lease liabilities	$ 946
Acquisition of undivided interest in a property through conversion of notes receivable		$ 22,201