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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (unaudited) - USD ($) shares in Thousands, $ in Thousands | Series A Preferred Stock [Member] ACCUMULATED DISTRIBUTIONS IN EXCESS OF NET INCOME [Member] | Series A Preferred Stock [Member] | Series B Preferred Stock [Member] ACCUMULATED DISTRIBUTIONS IN EXCESS OF NET INCOME [Member] | Series B Preferred Stock [Member] | PREFERRED SHARES [Member] | Common Shares and Limited Partnership Units [Member] | ACCUMULATED DISTRIBUTIONS IN EXCESS OF NET INCOME [Member] | NONREDEEMABLE NONCONTROLLING INTERESTS [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Apr. 30, 2014 |  |  |  |  | $ 138,674 | $ 843,268 | $ (389,758) | $ 128,362 | $ 720,546
Balance (in shares) at Apr. 30, 2014 |  |  |  |  | 5,750 | 109,019 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income attributable to Investors Real Estate Trust and noncontrolling interests |  |  |  |  |  |  | 24,087 | 4,432 | 28,519
Distributions - common shares and units |  |  |  |  |  |  | (61,247) | (8,607) | (69,854)
Distributions - preferred shares | $ (2,372) | $ (2,372) | $ (9,142) | $ (9,142) |  |  |  |  | (11,514)
Distribution reinvestment and share purchase plan |  |  |  |  |  | $ 64,856 |  |  | 64,856
Distribution reinvestment and share purchase plan (in shares) |  |  |  |  |  | 8,102 |  |  |
Shares issued and share-based compensation |  |  |  |  |  | $ 2,626 |  |  | 2,626
Shares issued and share-based compensation (in shares) |  |  |  |  |  | 151 |  |  |
Partnership units issued |  |  |  |  |  |  |  | 800 | 800
Redemption of units for common shares |  |  |  |  |  | $ 41,264 |  | (41,264) |
Redemption of units for common shares (in shares) |  |  |  |  |  | 7,183 |  |  |
Contributions from nonredeemable noncontrolling interests - consolidated real estate entities |  |  |  |  |  |  |  | 8,909 | 8,909
Distributions to nonredeemable noncontrolling interests - consolidated real estate entities |  |  |  |  |  |  |  | (3,926) | (3,926)
Other |  |  |  |  |  | $ (146) |  | 138 | (8)
Balance at Apr. 30, 2015 |  |  |  |  | $ 138,674 | $ 951,868 | (438,432) | 88,844 | 740,954
Balance (in shares) at Apr. 30, 2015 |  |  |  |  | 5,750 | 124,455 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income attributable to Investors Real Estate Trust and noncontrolling interests |  |  |  |  |  |  | 72,006 | 4,562 | 76,568
Distributions - common shares and units |  |  |  |  |  |  | (64,060) | (7,230) | (71,290)
Distributions - preferred shares | (2,372) | (2,372) | (9,142) | (9,142) |  |  |  |  | (11,514)
Distribution reinvestment and share purchase plan |  |  |  |  |  | $ 5,619 |  |  | 5,619
Distribution reinvestment and share purchase plan (in shares) |  |  |  |  |  | 821 |  |  |
Shares issued and share-based compensation |  |  |  |  |  | $ 1,728 |  |  | 1,728
Shares issued and share-based compensation (in shares) |  |  |  |  |  | 185 |  |  |
Partnership units issued |  |  |  |  |  |  |  | 18,226 | 18,226
Redemption of units for common shares |  |  |  |  |  | $ 1,477 |  | (1,477) |
Redemption of units for common shares (in shares) |  |  |  |  |  | 273 |  |  |
Shares repurchased |  |  |  |  |  | $ (35,000) |  |  | (35,000)
Shares repurchased (in shares) |  |  |  |  |  | (4,643) |  |  |
Distributions to nonredeemable noncontrolling interests - consolidated real estate entities |  |  |  |  |  |  |  | (7,029) | (7,029)
Adjustments to prior year redemption of units for common shares |  |  |  |  |  | $ (3,608) |  | 3,608 |
Balance at Apr. 30, 2016 |  |  |  |  | $ 138,674 | $ 922,084 | (442,000) | 99,504 | 718,262
Balance (in shares) at Apr. 30, 2016 |  |  |  |  | 5,750 | 121,091 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income attributable to Investors Real Estate Trust and noncontrolling interests |  |  |  |  |  |  | 43,347 | (12,400) | 30,947
Distributions - common shares and units |  |  |  |  |  |  | (55,907) | (7,453) | (63,360)
Distributions - preferred shares | $ (1,403) | $ (1,403) | $ (9,143) | $ (9,143) |  |  |  |  | (10,546)
Shares issued and share-based compensation |  |  |  |  |  | $ 358 |  |  | 358
Shares issued and share-based compensation (in shares) |  |  |  |  |  | 389 |  |  |
Redemption of units for common shares |  |  |  |  |  | $ 875 |  | (875) |
Redemption of units for common shares (in shares) |  |  |  |  |  | 503 |  |  |
Redemption of units for cash |  |  |  |  |  |  |  | (966) | (966)
Shares repurchased |  |  |  |  | $ (27,317) | $ (4,501) | (1,435) |  | (33,253)
Shares repurchased (in shares) |  |  |  |  | (1,150) | (778) |  |  |
Contributions from nonredeemable noncontrolling interests - consolidated real estate entities |  |  |  |  |  |  |  | 7,188 | 7,188
Distributions to nonredeemable noncontrolling interests - consolidated real estate entities |  |  |  |  |  |  |  | (174) | (174)
Conversion of to equity of notes receivable from nonredeemable noncontrolling interests – consolidated real estate entities |  |  |  |  |  |  |  | (7,366) | (7,366)
Acquisition of nonredeemable noncontrolling interests – consolidated real estate entities |  |  |  |  |  | $ (2,677) |  | (2,261) | (4,938)
Other |  |  |  |  |  | $ (18) |  | (40) | (58)
Other (in shares) |  |  |  |  |  | (6) |  |  |
Balance at Apr. 30, 2017 |  |  |  |  | $ 111,357 | $ 916,121 | $ (466,541) | $ 75,157 | $ 636,094
Balance (in shares) at Apr. 30, 2017 |  |  |  |  | 4,600 | 121,199 |  |  |

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Data Type: | na
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