Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Document Fiscal Year Focus	2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 126,829	$ 47,919	$ (123,467)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Impairment Losses, Including Discontinued Operations	0	14,278	107,763
Gain on sale of investment properties, including discontinued operations	(68,200)	(15,001)	(12,013)
Gain on sale of third party management and leasing business	(4,577)	(7,459)	0
Losses on abandoned predevelopment projects	0	0	937
Loss on extinguishment of debt	0	94	74
Impairment Losses on Investments in Unconsolidated Joint Ventures	0	0	608
Depreciation and amortization, including discontinued operations	76,478	52,439	54,061
Amortization of deferred financing costs	615	1,056	1,637
Amortization of stock options and restricted stock, net of forfeitures	1,898	2,244	2,113
Effect of certain non-cash adjustments to rental revenues	(11,660)	(3,938)	(6,719)
(Income) loss from unconsolidated joint ventures	(67,325)	(39,258)	17,691
Operating distributions from unconsolidated joint ventures	67,101	37,379	8,865
Land and multi-family cost of sales, net of closing costs paid	967	1,706	5,187
Land and multi-family acquisition and development expenditures	0	47	999
Changes in other operating assets and liabilities:
Change in other receivables and other assets, net	(9,619)	(851)	2,099
Change in operating liabilities	24,833	4,761	(2,256)
Net cash provided by operating activities	137,340	95,322	55,581
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from investment property sales	178,966	273,386	143,623
Proceeds from sale of third party management and leasing business	4,577	8,247	0
Property acquisition, development and tenant asset expenditures	(1,526,263)	(105,069)	(181,909)
Investment in unconsolidated joint ventures	(11,922)	(6,619)	(23,341)
Distributions from unconsolidated joint ventures	88,635	67,435	8,428
Collection of Notes Receivable	1,580	0	0
Change in notes receivable and other assets	(1,655)	2,504	(2,255)
Change in restricted cash	(111)	2,077	10,592
Net cash provided by (used in) investing activities	(1,266,193)	241,961	(44,862)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from credit facility	365,075	417,900	256,275
Repayment of credit and term facilities	(325,000)	(616,150)	(163,425)
Proceeds from other notes payable	304,275	113,026	0
Repayment of notes payable	(77,887)	(28,808)	(59,543)
Payment of loan issuance costs	(1,693)	(3,419)	(442)
Common stock issued, net of expenses	826,233	0	18
Common dividends paid	(27,192)	(18,748)	(18,649)
Preferred dividends paid	(10,008)	(12,907)	(12,907)
Preferred Stock Redemption	(74,827)	0	0
Contributions from noncontrolling interests	0	0	1,300
Distributions to noncontrolling interests	(26,040)	(16,143)	(16,087)
Net cash used in financing activities	952,936	(165,249)	(13,460)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(175,917)	172,034	(2,741)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	176,892	4,858	7,599
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 975	$ 176,892	$ 4,858