CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (4,160)	$ 19,971
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	28,576	24,536
Distributions of operating income from unconsolidated affiliates	4,724	1,299
Equity in earnings and gains of unconsolidated affiliates	(1,684)	(12,703)
Stock compensation expense	3,809	4,235
Amortization of financing costs	1,375	1,169
Other, net	(1,889)	(2,908)
Changes in assets and liabilities:
Other liabilities	1,461	1,076
Prepaid expenses and other assets	(2,240)	(5,736)
Rents receivable, net	(2,359)	(6,723)
Accounts payable and accrued expenses	(4,674)	273
Net cash provided by operating activities	22,939	24,489
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of real estate	(46,171)	(34,688)
Development and property improvement costs	(18,136)	(27,015)
Issuance of or advances on notes receivable	(2,951)	(150)
Investments in and advances to unconsolidated affiliates	(1,847)	(3,174)
Return of capital from unconsolidated affiliates and other	16,210	2,677
Proceeds from notes receivable	26,000	0
Return of deposits for properties under contract	1,750	0
Proceeds from disposition of properties of unconsolidated affiliates	0	25,080
Payment of deferred leasing costs	(1,134)	(2,033)
Net cash used in investing activities	(26,279)	(39,303)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on mortgage and other notes	(45,246)	(5,236)
Principal payments on unsecured debt	(420,500)	(94,100)
Proceeds received on mortgage and other notes	47,273	93,044
Proceeds from unsecured debt	447,800	20,000
Payments for repurchase of Common Shares	(31,961)	0
Capital contributions from noncontrolling interests	0	20,264
Distributions to noncontrolling interests	(2,411)	(6,163)
Dividends paid to Common Shareholders	(22,601)	(34,275)
Deferred financing and other costs	(2,822)	(1,701)
Net cash used in financing activities	(30,468)	(8,167)
Decrease in cash and restricted cash	(33,808)	(22,981)
Cash of $74,823 and $71,805, respectively and restricted cash of $10,846 and $22,904 respectively, beginning of period	85,669	94,709	$ 94,709
Cash of $39,344 and $47,707, respectively and restricted cash of $12,517 and $24,021 respectively, end of period	51,861	71,728	$ 85,669
Supplemental disclosure of cash flow information
Cash paid during the period for interest, net of capitalized interest of $1,492 and $5,009, respectively	11,910	9,629
Cash paid for income taxes, net of (refunds)	673	220
Supplemental disclosure of non-cash investing activities
Assumption of accounts payable and accrued expenses through acquisition of real estate	425	662
Acquisition of undivided interest in a property through conversion of notes receivable	$ 22,201	$ 0