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EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jul. 31, 2012	Jul. 31, 2011
NUMERATOR [Abstract]
Income from continuing operations - Investors Real Estate Trust	$ 1,737	$ 1,443
Income from discontinued operations - Investors Real Estate Trust	(58)	(22)
Net income attributable to Investors Real Estate Trust	1,679	1,421
Dividends to preferred shareholders	(593)	(593)
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS	1,086	828
Noncontrolling interests - Operating Partnership	251	178
Numerator for diluted earnings per share	$ 1,337	$ 1,006
DENOMINATOR [Abstract]
Denominator for basic earnings per share weighted average shares	90,518	80,854
Effect of convertible operating partnership units	20,774	19,990
Denominator for diluted earnings per share	111,292	100,844
Earnings per common share from continuing operations - Investors Real Estate Trust - basic and diluted	0.01	0.01
Earnings per common share from discontinued operations - Investors Real Estate Trust - basic and diluted	0.00	0.00
NET INCOME PER COMMON SHARE - BASIC AND DILUTED	0.01	0.01

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