Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Jan. 31, 2012
Real Estate
Completed rental properties	$ 8,631,542	$ 7,183,448
Projects under construction and development	1,326,703	2,328,979
Land held for development and sale	65,059	77,298
Total Real Estate	10,023,304	9,589,725
Less accumulated depreciation	(1,654,632)	(1,526,503)
Real Estate, net – (variable interest entities $1,416.9 million and $2,103.8 million, respectively)	8,368,672	8,063,222
Cash and equivalents – (variable interest entities $14.2 million and $17.8 million, respectively)	333,220	217,486
Restricted cash and escrowed funds – (variable interest entities $114.9 million and $348.1 million, respectively)	410,414	542,566
Notes and accounts receivable, net	426,200	406,244
Investments in and advances to unconsolidated entities	456,628	609,079
Other assets – (variable interest entities $92.5 million and $130.8 million, respectively)	614,592	608,541
Land held for divestiture	2,706	57,145
Total Assets	10,612,432	10,504,283
Liabilities
Mortgage debt and notes payable, nonrecourse – (variable interest entities $624.1 million and $1,122.0 million, respectively)	5,738,960	5,640,439
Bank revolving credit facility	0	0
Senior and subordinated debt – (variable interest entities $29.0 million, as of each period)	1,032,969	1,038,529
Accounts payable, accrued expenses and other liabilities – (variable interest entities $76.2 million and $171.0 million, respectively)	1,093,963	1,112,462
Cash distributions and losses in excess of investments in unconsolidated entities	292,727	279,708
Deferred income taxes	474,406	433,040
Mortgage debt and notes payable, nonrecourse of land held for divestiture	1,700	19,084
Total Liabilities	8,634,725	8,523,262
Redeemable Noncontrolling Interest	239,136	229,149
Commitments and Contingencies	0	0
Common stock – $.33 1/3 par value
Common stock, value	61,321	56,423
Additional paid-in capital	932,045	740,988
Retained earnings	576,285	571,989
Less treasury stock, at cost; 6,582 and 108,329 Class A shares, respectively	(108)	(1,874)
Shareholders' equity before accumulated other comprehensive loss	1,580,095	1,587,526
Accumulated other comprehensive loss	(103,203)	(120,460)
Total Shareholders’ Equity	1,476,892	1,467,066
Noncontrolling interest	261,679	284,806
Total Equity	1,738,571	1,751,872
Total Liabilities and Equity	10,612,432	10,504,283
Series A Preferred Stock
Shareholders’ Equity
Preferred stock	10,552	220,000
Common stock – $.33 1/3 par value
Total Equity	10,552	220,000
Other Preferred Stock
Shareholders’ Equity
Preferred stock	0	0
Common Stock Class A
Common stock – $.33 1/3 par value
Common stock, value	54,576	49,445
Total Equity	54,576	49,445
Common Stock Class B
Common stock – $.33 1/3 par value
Common stock, value	6,745	6,978
Total Equity	$ 6,745	$ 6,978