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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Apr. 30, 2013
Carrying Amount [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	$ 93,193	$ 94,133
Other investments	640	639
FINANCIAL LIABILITIES [Abstract]
Other debt	32,289	18,076
Line of credit	10,000	10,000
Mortgages payable	1,030,407	1,049,206
Fair Value [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	93,193	94,133
Other investments	640	639
FINANCIAL LIABILITIES [Abstract]
Other debt	32,620	18,156
Line of credit	10,000	10,000
Mortgages payable	1,142,618	1,160,190
Nonrecurring [Member]
Fair Value Measurements on a Nonrecurring Basis [Abstract]
Real Estate Investment	3,899	335
Real estate held for sale	3,969
Nonrecurring [Member] | Level 1 [Member]
Fair Value Measurements on a Nonrecurring Basis [Abstract]
Real Estate Investment	0	0
Real estate held for sale	0
Nonrecurring [Member] | Level 2 [Member]
Fair Value Measurements on a Nonrecurring Basis [Abstract]
Real Estate Investment	0	0
Real estate held for sale	0
Nonrecurring [Member] | Level 3 [Member]
Fair Value Measurements on a Nonrecurring Basis [Abstract]
Real Estate Investment	3,899	335
Real estate held for sale	$ 3,969

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951



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-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 7

-Footnote 1

-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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-Publisher FASB

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 13

-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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-Publisher FASB

-Name Accounting Standards Codification

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-Name Statement of Financial Accounting Standard (FAS)

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-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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-Name Accounting Standards Codification

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