Mortgage Debt and Notes Payable, Nonrecourse (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013
Composition of mortgage debt and notes payable, nonrecourse maturities
Mortgage debt and notes payable nonrecourse maturities total maturities in 2014	$ 759,801
Mortgage debt and notes payable nonrecourse maturities total maturities in 2015	983,656
Mortgage debt and notes payable nonrecourse maturities total maturities in 2016	478,938
Mortgage debt and notes payable nonrecourse maturities total maturities in 2017	366,470
Mortgage debt and notes payable nonrecoures maturities total maturities in 2018	1,203,220
Mortgage debt and notes payable nonrecourse maturities total maturities thereafter	1,941,760
Mortgage Debt and Notes Payable Nonrecourse	$ 5,733,845

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Nonrecourse debt including land held for divestiture debt

+ References

No definition available.

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 47

-Paragraph 10

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year.

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