Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net earnings (loss)	$ (57,004,000)	$ 14,449,000
Depreciation and amortization	61,814,000	55,009,000
Amortization of mortgage procurement costs	2,101,000	2,125,000
Loss on extinguishment of debt	35,154,000	164,000
Net loss on disposition of partial interest in rental properties	0	467,000
Net gain on change in control of interests	0	(2,759,000)
Deferred income tax expense (benefit)	2,559,000	(32,003,000)
Earnings from unconsolidated entities	9,313,000	34,029,000
Stock-based compensation expense	5,255,000	3,966,000
Amortization and mark-to-market adjustments of derivative instruments	(2,182,000)	5,524,000
Cash distributions from operations of unconsolidated entities	11,078,000	11,431,000
Non-cash operating expenses and deferred taxes included in discontinued operations	0	9,942,000
Gain on disposition of rental properties included in discontinued operations	0	(26,824,000)
Decrease in land inventory	666,000	4,185,000
Increase in notes and accounts receivable	(11,000,000)	(6,653,000)
Increase in other assets	(3,777,000)	(3,261,000)
(Decrease) increase in accounts payable, accrued expenses and other liabilities	(22,359,000)	18,188,000
Net cash provided by operating activities	12,992,000	19,921,000
Cash Flows from Investing Activities
Capital expenditures	(74,989,000)	(90,753,000)
Acquisitions	(11,119,000)	(19,988,000)
Payment of lease procurement costs	(2,930,000)	(648,000)
Increase in notes receivable	(8,722,000)	(225,000)
Decrease in restricted cash used for investing purposes	15,973,000	10,779,000
Proceeds from disposition of rental properties	1,400,000	28,680,000
Contributions to investments in and advances to unconsolidated entities	(43,140,000)	(21,161,000)
Distributions from investments in and advances to unconsolidated entities	4,000,000	44,178,000
Net cash used in investing activities	(119,527,000)	(49,138,000)
Cash Flows from Financing Activities
Proceeds from nonrecourse mortgage debt and notes payable	6,260,000	103,090,000
Principal payments on nonrecourse mortgage debt and notes payable	(78,297,000)	(97,171,000)
Borrowings on revolving credit facility	65,950,000	85,225,000
Payments on revolving credit facility	(6,000,000)	(85,225,000)
Payments to noteholders related to exchange of convertible senior notes	(37,752,000)	0
Transaction costs related to exchange of convertible senior notes	(4,675,000)	0
Proceeds received from termination of convertible senior note hedge	17,818,000	0
Payments of deferred financing costs	(2,988,000)	(1,278,000)
Purchase of treasury stock	(588,000)	(100,000)
Exercise of stock options	0	181,000
Acquisitions of noncontrolling interests	(308,000)	(8,125,000)
Contributions from noncontrolling interests	16,055,000	1,554,000
Distributions to noncontrolling interests	(4,553,000)	(4,972,000)
Net cash used in financing activities	(29,078,000)	(6,821,000)
Net decrease in cash and equivalents	(135,613,000)	(36,038,000)
Cash and equivalents at beginning of period	326,518,000	280,206,000
Cash and equivalents at end of period	$ 190,905,000	$ 244,168,000