Consolidated Balance Sheets (Unaudited) (USD $)	Apr. 30, 2013	Jan. 31, 2013
Real Estate
Completed rental properties	$ 8,721,388,000	$ 8,631,542,000
Projects under construction and development	1,331,899,000	1,326,703,000
Land held for development and sale	68,139,000	65,059,000
Total Real Estate	10,121,426,000	10,023,304,000
Less accumulated depreciation	(1,702,143,000)	(1,654,632,000)
Real Estate, net - (variable interest entities $1,366.7 million and $1,416.9 million, respectively)	8,419,283,000	8,368,672,000
Cash and equivalents - (variable interest entities $13.3 million and $14.2 million, respectively)	260,961,000	333,220,000
Restricted cash and escrowed funds - (variable interest entities $162.2 million and $114.9 million, respectively)	412,519,000	410,414,000
Notes and accounts receivable, net	454,527,000	426,200,000
Investments in and advances to unconsolidated entities	428,701,000	456,628,000
Other assets - (variable interest entities $86.6 million and $92.5 million, respectively)	603,544,000	614,592,000
Land held for divestiture	3,651,000	2,706,000
Total Assets	10,583,186,000	10,612,432,000
Liabilities
Mortgage debt and notes payable, nonrecourse - (variable interest entities $594.1 million and $624.1 million, respectively)	5,732,268,000	5,738,960,000
Bank revolving credit facility	45,000,000	0
Senior and subordinated debt - (variable interest entities $29.0 million as of each period)	841,335,000	1,032,969,000
Accounts payable, accrued expenses and other liabilities - (variable interest entities $83.1 million and $76.2 million, respectively)	1,091,433,000	1,093,963,000
Cash distributions and losses in excess of investments in unconsolidated entities	295,529,000	292,727,000
Deferred income taxes	464,816,000	474,406,000
Mortgage debt and notes payable, nonrecourse of land held for divestiture	1,577,000	1,700,000
Total Liabilities	8,471,958,000	8,634,725,000
Redeemable Noncontrolling Interest	238,942,000	239,136,000
Commitments and Contingencies	0	0
Common stock - $.33 1/3 par value
Common stock, value	64,847,000	61,321,000
Additional paid-in capital	1,060,382,000	932,045,000
Retained earnings	556,732,000	576,285,000
Less treasury stock, at cost; 949,992 and 6,582 Class A shares, respectively	(16,116,000)	(108,000)
Shareholders' equity before accumulated other comprehensive loss	1,665,845,000	1,580,095,000
Accumulated other comprehensive loss	(102,808,000)	(103,203,000)
Total Shareholders' Equity	1,563,037,000	1,476,892,000
Noncontrolling interest	309,249,000	261,679,000
Total Equity	1,872,286,000	1,738,571,000
Total Liabilities and Equity	10,583,186,000	10,612,432,000
Series A Preferred Stock
Shareholders' Equity
Preferred stock	0	10,552,000
Common stock - $.33 1/3 par value
Total Equity	0	10,552,000
Other Preferred Stock
Shareholders' Equity
Preferred stock	0	0
Common Stock Class A
Common stock - $.33 1/3 par value
Common stock, value	58,108,000	54,576,000
Total Equity	58,108,000	54,576,000
Common Stock Class B
Common stock - $.33 1/3 par value
Common stock, value	6,739,000	6,745,000
Total Equity	$ 6,739,000	$ 6,745,000