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

Equity impact of aggregate cash, stock, and paid-in-kind dividends declared for preferred shareholders during the period.

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