Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012	Jan. 31, 2012
Real Estate
Completed rental properties	$ 7,549,758	$ 7,183,448
Projects under construction and development	2,361,600	2,328,979
Land held for development and sale	77,175	77,298
Total Real Estate	9,988,533	9,589,725
Less accumulated depreciation	(1,602,423)	(1,526,503)
Real Estate, net - (variable interest entities $2,318.2 million and $2,103.8 million, respectively)	8,386,110	8,063,222
Cash and equivalents - (variable interest entities $32.9 million and $17.8 million, respectively)	240,866	217,486
Restricted cash and escrowed funds - (variable interest entities $172.8 million and $348.1million, respectively)	476,645	542,566
Notes and accounts receivable, net	399,964	406,244
Investments in and advances to unconsolidated entities	572,230	609,079
Other assets - (variable interest entities $130.2 million and $130.8 million, respectively)	614,787	608,541
Land held for divestiture	23,417	57,145
Operating property assets held for sale	18,834	0
Total Assets	10,732,853	10,504,283
Liabilities
Mortgage debt and notes payable, nonrecourse - (variable interest entities $1,224.3 million and $1,122.0 million, respectively)	5,754,873	5,640,439
Bank revolving credit facility	0	0
Senior and subordinated debt - (variable interest entities $29.0 million as of each period)	1,157,666	1,038,529
Accounts payable, accrued expenses and other liabilities - (variable interest entities $217.6 million and $171.0 million, respectively)	1,086,192	1,112,462
Cash distributions and losses in excess of investments in unconsolidated entities	292,700	279,708
Deferred income taxes	458,825	433,040
Mortgage debt and notes payable, nonrecourse of land held for divestiture	19,571	19,084
Liabilities of operating property held for sale	15,092	0
Total Liabilities	8,784,919	8,523,262
Redeemable Noncontrolling Interest	232,107	229,149
Commitments and Contingencies	0	0
Common stock - $.33 1/3 par value
Common stock, value	56,572	56,423
Additional paid-in capital	740,426	740,988
Retained earnings	543,324	571,989
Less treasury stock, at cost; 213,376 and 108,329 Class A shares, respectively	(3,438)	(1,874)
Shareholders' equity before accumulated other comprehensive loss	1,556,884	1,587,526
Accumulated other comprehensive loss	(117,129)	(120,460)
Total Shareholders' Equity	1,439,755	1,467,066
Noncontrolling interest	276,072	284,806
Total Equity	1,715,827	1,751,872
Total Liabilities and Equity	10,732,853	10,504,283
Series A Preferred Stock
Shareholders' Equity
Preferred stock	220,000	220,000
Common stock - $.33 1/3 par value
Total Equity	220,000	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	49,619	49,445
Total Equity	49,619	49,445
Common Stock Class B
Common stock - $.33 1/3 par value
Common stock, value	6,953	6,978
Total Equity	$ 6,953	$ 6,978