CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 152,146	$ 44,640	$ 89,936
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	49,645	43,071	38,769
Amortization of financing costs	3,003	3,082	3,569
Gain on sale of property	(14,360)	(18,802)	(71,203)
Loss on debt extinguishment	335	1,565	2,739
Gain on involuntary conversion of asset	0	0	(2,368)
Reserve for notes receivable	0	0	405
Impairment of asset	0	8,183	0
Share compensation expense	6,744	7,667	3,350
Equity in earnings of unconsolidated affiliates	(8,723)	(12,382)	1,482
Gain on disposition of properties of unconsolidated affiliates	(102,855)	0	(3,061)
Distributions of operating income from unconsolidated affiliates	9,579	9,829	3,733
Other, net	(4,147)	(4,771)	278
Changes in assets and liabilities
Cash in escrow	(686)	218	2,035
Rents receivable, net	(8,097)	997	(6,757)
Prepaid expenses and other assets	852	(22,524)	1,033
Accounts payable and accrued expenses	(4,016)	5,586	(5,648)
Other liabilities	3,099	(1,126)	709
Net cash provided by operating activities	82,519	65,233	59,001
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of real estate	(250,353)	(220,041)	(241,894)
Redevelopment and property improvement costs	(140,118)	(106,883)	(88,787)
Deferred leasing costs	(3,914)	(4,617)	(7,275)
Insurance proceeds from involuntary conversion of asset	0	0	3,672
Investments in and advances to unconsolidated affiliates	(156,972)	(56,171)	(160,888)
Return of capital from unconsolidated affiliates	74,371	108,899	22,296
Proceeds from disposition of properties of unconsolidated affiliates	190,356	0	0
Consolidation of previously unconsolidated investment	0	1,864	0
Proceeds from notes receivable	18,095	29,583	25,388
Issuance of notes receivable	(31,169)	(45,050)	(108,629)
Proceeds from disposition of properties	31,188	204,537	419,372
Net cash used in investing activities	(268,516)	(87,879)	(136,745)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on mortgage and other notes	(176,323)	(437,257)	(549,095)
Proceeds received on mortgage and other notes	284,303	572,443	433,815
Loan proceeds held as restricted cash	79,191	(109,795)	0
Purchase of convertible notes payable	0	(550)	0
Deferred financing and other costs	(3,672)	(11,741)	(6,772)
Capital contributions from noncontrolling interests	57,970	49,324	172,228
Distributions to noncontrolling interests	(221,330)	(88,975)	(161,765)
Dividends paid to Common Shareholders	(53,210)	(44,115)	(32,143)
Proceeds from issuance of Common Shares, net of issuance costs of $2,112, $1,645, and $3,054 respectively	357,459	80,688	223,477
Net cash provided by financing activities	324,388	10,022	79,745
Increase (decrease) in cash and cash equivalents	138,391	(12,624)	2,001
Cash and cash equivalents, beginning of period	79,189	91,813	89,812
Cash and cash equivalents, end of period	217,580	79,189	91,813
Supplemental disclosure of cash flow information
Cash paid during the period for interest, net of capitalized interest of $12,650, $9,193, and $5,955, respectively	46,542	41,543	32,327
Cash paid for income taxes, net of refunds received of $2,045, $0 and $0, respectively	(1,772)	301	941
Supplemental disclosure of non-cash investing activities
Acquisition of real estate through assumption of debt	29,794	0	63,766
Disposition of real estate through forgiveness of debt	(22,865)	0	0
Acquisition of real estate through issuance of OP Units	38,937	33,300	2,279
Investments in and advances to unconsolidated affiliates through issuance of OP Units	5,114	0	0
Acquisition of real estate through conversion of notes receivable	38,000	18,500	14,000
Consolidation of previously unconsolidated investment
Real estate, net	0	(118,484)	0
Mortgage notes payable	0	166,200	0
Distributions in excess of income from, and investments in, unconsolidated affiliates	0	(10,298)	0
Other assets and liabilities	0	(1,605)	0
Noncontrolling interest	$ 0	$ (33,949)	$ 0