CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 142,099	$ 142,055
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	45,022	36,055
Amortization of financing costs	2,577	2,214
Gain on disposition of properties	(89,063)	(13,698)
Impairment of asset	5,000	0
Share compensation expense	5,669	5,542
Equity in earnings of unconsolidated affiliates	(12,194)	(7,382)
Gain on disposition of property of unconsolidated affiliates	(24,043)	(102,855)
Distributions of operating income from unconsolidated affiliates	11,747	7,780
Other, net	(5,103)	(2,106)
Changes in assets and liabilities
Cash in escrow	(6,757)	(7,148)
Rents receivable, net	(2,454)	(3,707)
Prepaid expenses and other assets	1,901	430
Accounts payable and accrued expenses	7,738	4,209
Other liabilities	3,203	295
Net cash provided by operating activities	85,342	61,684
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of real estate	(292,671)	(136,978)
Redevelopment and property improvement costs	(159,360)	(105,049)
Deferred leasing costs	(5,931)	(2,654)
Investments in and advances to unconsolidated affiliates	(10,581)	(59,529)
Return of capital from unconsolidated affiliates	9,574	30,604
Proceeds from disposition of property of unconsolidated affiliates	38,392	188,870
Proceeds from notes receivable	15,984	18,095
Issuance of notes receivable	(48,350)	(23,519)
Proceeds from sale of properties, net	198,434	31,188
Net cash used in investing activities	(254,509)	(58,972)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on mortgage and other notes	(92,468)	(50,584)
Principal payments on unsecured debt	(174,815)	(83,750)
Proceeds received from mortgage and other notes	85,859	146,600
Proceeds received from unsecured debt	253,200	82,400
Loan proceeds held as restricted cash	43,315	60,514
Deferred financing and other costs	(3,155)	(2,120)
Capital contributions from noncontrolling interests	34,895	35,317
Distributions to noncontrolling interests	(79,575)	(213,496)
Dividends paid to Common Shareholders	(69,788)	(39,399)
Proceeds from issuance of Common Shares, net of issuance costs of $655 and $1,818, respectively	26,933	113,749
Net cash provided by financing activities	24,401	49,231
(Decrease) increase in cash and cash equivalents	(144,766)	51,943
Cash and cash equivalents, beginning of period	217,580	79,189
Cash and cash equivalents, end of period	72,814	131,132
Supplemental disclosure of cash flow information
Cash paid during the period for interest, net of capitalized interest of $11,847 and $9,250, respectively	34,146	34,935
Cash paid for income taxes	2,543	316
Supplemental disclosure of non-cash investing activities
Acquisition of real estate through assumption of debt	90,765	29,794
Disposition of real estate through cancellation of debt	0	(22,865)
Acquisition of real estate through issuance of OP Units	0	38,937
Acquisition of real estate through conversion of notes receivable	6,886	38,000
Acquisition of real estate through assumption of restricted cash	28,192	0
Disposition of air rights through issuance of notes receivable	$ (29,539)	$ 0