Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Real Estate
Completed rental properties	$ 7,822,881,000	$ 7,753,561,000
Projects under construction and development	536,966,000	477,957,000
Land inventory	96,675,000	97,469,000
Total Real Estate	8,456,522,000	8,328,987,000
Less accumulated depreciation	(1,606,124,000)	(1,555,965,000)
Real Estate, net – (variable interest entities $474.3 million and $427.8 million, respectively)	6,850,398,000	6,773,022,000
Cash and equivalents – (variable interest entities $23.7 million and $20.6 million, respectively)	190,905,000	326,518,000
Restricted cash – (variable interest entities $25.5 million and $28.6 million, respectively)	250,557,000	266,530,000
Notes and accounts receivable, net	436,599,000	419,038,000
Investments in and advances to unconsolidated entities	669,605,000	620,466,000
Other assets – (variable interest entities $21.6 million and $19.6 million, respectively)	397,327,000	409,366,000
Total Assets	8,795,391,000	8,814,940,000
Liabilities
Mortgage debt and notes payable, nonrecourse – (variable interest entities $224.5 million and $250.7 million, respectively)	4,202,440,000	4,238,201,000
Revolving credit facility	59,950,000	0
Convertible senior debt	411,194,000	700,000,000
Accounts payable, accrued expenses and other liabilities – (variable interest entities $67.9 million and $42.6 million, respectively)	832,313,000	847,011,000
Cash distributions and losses in excess of investments in unconsolidated entities	211,255,000	211,493,000
Deferred income taxes	486,101,000	482,474,000
Total Liabilities	6,203,253,000	6,479,179,000
Redeemable Noncontrolling Interest	178,050,000	183,038,000
Commitments and Contingencies	0	0
Shareholders' Equity
Preferred stock	0	0
Common stock - $.33 1/3 par value
Common stock	71,274,000	66,689,000
Additional paid-in capital	1,469,273,000	1,165,828,000
Retained earnings	508,989,000	563,198,000
Less treasury stock, at cost; 1,378,962 and 1,095,310 Class A shares, respectively	(26,013,000)	(18,922,000)
Shareholders' equity before accumulated other comprehensive loss	2,023,523,000	1,776,793,000
Accumulated other comprehensive loss	(57,372,000)	(58,846,000)
Total Shareholders' Equity	1,966,151,000	1,717,947,000
Noncontrolling interest	447,937,000	434,776,000
Total Equity	2,414,088,000	2,152,723,000
Total Liabilities and Equity	8,795,391,000	8,814,940,000
Common stock Class A
Common stock - $.33 1/3 par value
Common stock	64,960,000	60,286,000
Total Equity	64,960,000	60,286,000
Common stock Class B
Common stock - $.33 1/3 par value
Common stock	6,314,000	6,403,000
Total Equity	$ 6,314,000	$ 6,403,000