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EQUITY (Details) (USD $) | 3 Months Ended
--- | ---
Jul. 31, 2014 | Jul. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Aggregate gross sales price of common shares of beneficial interest allowed to be sold | $ 75,000,000 |
Units converted to common shares (in shares) | 3,100,000 | 125,000
Units converted to common shares | 18,300,000 | 706,000
2008 Incentive Award Plan [Member] |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Shares issued (in shares) | 204,000 | 13,000
Shares issued | 1,900,000 | 112,000
Distribution Reinvestment and Share Purchase Plan [Member] |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Shares registered under Distribution Reinvestment and Share Purchase Plan (in shares) | 10,000,000 |
Shares issued (in shares) | 2,400,000 | 2,600,000
Shares issued | $ 20,900,000 | $ 22,700,000
Average price of shares issued (in dollars per share) | $ 8.64 | $ 8.72

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- Definition The value of the stock converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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