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EARNINGS PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2013 | Jan. 31, 2012 | Jan. 31, 2013 | Jan. 31, 2012
NUMERATOR [Abstract] |  |  |  |
Income from continuing operations - Investors Real Estate Trust | $ 4,691 | $ 2,210 | $ 12,642 | $ 4,434
Income (loss) from discontinued operations - Investors Real Estate Trust | 633 | (83) | 2,873 | 399
Net income attributable to Investors Real Estate Trust | 5,324 | 2,127 | 15,515 | 4,833
Dividends to preferred shareholders | (2,879) | (593) | (6,350) | (1,779)
Numerator for basic earnings per share - net income available to common shareholders | 2,445 | 1,534 | 9,165 | 3,054
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS | 2,445 | 1,534 | 9,165 | 3,054
Noncontrolling interests - Operating Partnership | 556 | 351 | 2,097 | 723
Numerator for diluted earnings per share | $ 3,001 | $ 1,885 | $ 11,262 | $ 3,777
DENOMINATOR [Abstract] |  |  |  |
Denominator for basic earnings per share weighted average shares | 93,794 | 84,339 | 92,260 | 82,424
Effect of convertible operating partnership units | 21,413 | 19,596 | 21,098 | 19,752
Denominator for diluted earnings per share | 115,207 | 103,935 | 113,358 | 102,176
Earnings per common share from continuing operations - Investors Real Estate Trust - basic and diluted | $ 0.02 | $ 0.02 | $ 0.07 | $ 0.03
Earnings per common share from discontinued operations - Investors Real Estate Trust - basic and diluted | $ 0.01 | $ 0.00 | $ 0.03 | $ 0.01
NET INCOME PER COMMON SHARE - BASIC AND DILUTED | $ 0.03 | $ 0.02 | $ 0.10 | $ 0.04

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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 -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. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -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. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 -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. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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