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OPERATING SEGMENTS (Details) (USD $) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Apr. 30, 2014 | Jan. 31, 2014 | Oct. 31, 2013 | Jul. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2013 | Oct. 31, 2012 | Jul. 31, 2012 | Apr. 30, 2014 Segment | Apr. 30, 2013 | Apr. 30, 2012 | Apr. 30, 2011
OPERATING SEGMENTS [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments |  |  |  |  |  |  |  |  |  | 5 |  |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate revenue | $ 66,983,000 | $ 67,629,000 | $ 65,772,000 | $ 65,098,000 | $ 64,184,000 |  | $ 63,080,000 | $ 61,864,000 | $ 58,930,000 | $ 265,482,000 | $ 248,058,000 |  | $ 228,671,000 |
Gain on involuntary conversion |  |  |  |  |  |  |  |  |  | 2,480,000 | 5,084,000 |  | 274,000 |
Other expenses |  |  |  |  |  |  |  |  |  | (2,132,000) | (2,173,000) |  | (1,898,000) |
Interest expense |  |  |  |  |  |  |  |  |  | (59,142,000) | (61,154,000) |  | (61,801,000) |
Income (loss) before gain (loss) on sale of real estate and other investments and income (loss) from discontinued operations |  |  |  |  |  |  |  |  |  | (23,339,000) | 20,677,000 |  | 8,644,000 |
Loss on sale of real estate and other investments |  |  |  |  |  |  |  |  |  | (51,000) | 0 |  | 0 |
Income from continuing operations |  |  |  |  |  |  |  |  |  | (23,390,000) | 20,677,000 |  | 8,644,000 |
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  |  | 6,450,000 | 9,295,000 |  | 1,062,000 |
Net Income |  |  |  |  |  |  |  |  |  | (16,940,000) | 29,972,000 |  | 9,706,000 |
Segment Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property owned | 1,996,031,000 |  |  |  | 2,032,970,000 | [1] |  |  |  | 1,996,031,000 | 2,032,970,000 | [1] |  |
Less accumulated depreciation | (424,288,000) |  |  |  | (420,421,000) | [1] |  |  |  | (424,288,000) | (420,421,000) | [1] |  |
Total property owned | 1,571,743,000 |  |  |  | 1,612,549,000 | [1] |  |  |  | 1,571,743,000 | 1,612,549,000 | [1] |  |
Real estate held for sale | 2,951,000 |  |  |  | 0 | [1] |  |  |  | 2,951,000 | 0 | [1] |  |
Cash and cash equivalents | 47,267,000 |  |  |  | 94,133,000 | [1] |  |  |  | 47,267,000 | 94,133,000 | [1] | 39,989,000 | 41,191,000
Other investments | 329,000 |  |  |  | 639,000 | [1] |  |  |  | 329,000 | 639,000 | [1] |  |
Development in progress | 104,609,000 |  |  |  | 46,782,000 | [1] |  |  |  | 104,609,000 | 46,782,000 | [1] |  |
Unimproved land | 22,864,000 |  |  |  | 21,503,000 | [1] |  |  |  | 22,864,000 | 21,503,000 | [1] |  |
Total Assets | 1,869,221,000 |  |  |  | 1,889,554,000 | [1] |  |  |  | 1,869,221,000 | 1,889,554,000 | [1] |  |
Segment Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate revenue |  |  |  |  |  |  |  |  |  | 265,482,000 | 248,058,000 |  | 228,671,000 |
Real estate expenses |  |  |  |  |  |  |  |  |  | 108,487,000 | 99,059,000 |  | 93,350,000 |
Gain on involuntary conversion |  |  |  |  |  |  |  |  |  | 2,480,000 | 5,084,000 |  | 274,000 |
Net operating income |  |  |  |  |  |  |  |  |  | 159,475,000 | 154,083,000 |  | 135,595,000 |
Depreciation/amortization |  |  |  |  |  |  |  |  |  | (70,918,000) | (62,333,000) |  | (56,650,000) |
Administrative, advisory and trustee services |  |  |  |  |  |  |  |  |  | (10,743,000) | (8,494,000) |  | (7,381,000) |
Other expenses |  |  |  |  |  |  |  |  |  | (2,132,000) | (2,173,000) |  | (1,898,000) |
Impairment of real estate investments |  |  |  |  |  |  |  |  |  | (42,566,000) | 0 |  |  |
Interest expense |  |  |  |  |  |  |  |  |  | (59,142,000) | (61,154,000) |  | (61,801,000) |
Interest and other income |  |  |  |  |  |  |  |  |  | 2,687,000 | 748,000 |  | 779,000 |
Income (loss) before gain (loss) on sale of real estate and other investments and income (loss) from discontinued operations |  |  |  |  |  |  |  |  |  | (23,339,000) |  |  |  |
Loss on sale of real estate and other investments |  |  |  |  |  |  |  |  |  | (51,000) |  |  |  |
Income from continuing operations |  |  |  |  |  |  |  |  |  | (23,390,000) | 20,677,000 |  | 8,644,000 |
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  |  | 6,450,000 | 9,295,000 |  | 1,062,000 |
Net Income |  |  |  |  |  |  |  |  |  | (16,940,000) | 29,972,000 |  | 9,706,000 |
Segment Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property owned | 1,996,031,000 |  |  |  | 2,032,970,000 |  |  |  |  | 1,996,031,000 | 2,032,970,000 |  |  |
Less accumulated depreciation | (424,288,000) |  |  |  | (420,421,000) |  |  |  |  | (424,288,000) | (420,421,000) |  |  |
Total property owned | 1,571,743,000 |  |  |  | 1,612,549,000 |  |  |  |  | 1,571,743,000 | 1,612,549,000 |  | 1,518,519,000 |
Real estate held for sale | 2,951,000 |  |  |  | 0 |  |  |  |  | 2,951,000 | 0 |  |  |
Cash and cash equivalents | 47,267,000 |  |  |  | 94,133,000 |  |  |  |  | 47,267,000 | 94,133,000 |  |  |
Other investments | 329,000 |  |  |  | 639,000 |  |  |  |  | 329,000 | 639,000 |  |  |
Receivables and other assets | 119,458,000 |  |  |  | 113,948,000 |  |  |  |  | 119,458,000 | 113,948,000 |  |  |
Development in progress | 104,609,000 |  |  |  | 46,782,000 |  |  |  |  | 104,609,000 | 46,782,000 |  |  |
Unimproved land | 22,864,000 |  |  |  | 21,503,000 |  |  |  |  | 22,864,000 | 21,503,000 |  |  |
Total Assets | 1,869,221,000 |  |  |  | 1,889,554,000 |  |  |  |  | 1,869,221,000 | 1,889,554,000 |  |  |
Multi-Family Residential [Member] | Segment Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate revenue |  |  |  |  |  |  |  |  |  | 102,059,000 | 89,923,000 |  | 71,728,000 |
Real estate expenses |  |  |  |  |  |  |  |  |  | 46,138,000 | 38,223,000 |  | 33,386,000 |
Gain on involuntary conversion |  |  |  |  |  |  |  |  |  | 2,480,000 | 3,852,000 |  | 0 |
Net operating income |  |  |  |  |  |  |  |  |  | 58,401,000 | 55,552,000 |  | 38,342,000 |
Segment Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property owned | 753,731,000 |  |  |  | 659,696,000 |  |  |  |  | 753,731,000 | 659,696,000 |  |  |
Less accumulated depreciation | (158,100,000) |  |  |  | (140,354,000) |  |  |  |  | (158,100,000) | (140,354,000) |  |  |
Total property owned | 595,631,000 |  |  |  | 519,342,000 |  |  |  |  | 595,631,000 | 519,342,000 |  | 410,949,000 |
Commercial-Office [Member] | Segment Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate revenue |  |  |  |  |  |  |  |  |  | 77,440,000 | 75,962,000 |  | 73,493,000 |
Real estate expenses |  |  |  |  |  |  |  |  |  | 38,190,000 | 37,267,000 |  | 34,126,000 |
Gain on involuntary conversion |  |  |  |  |  |  |  |  |  | 0 | 0 |  | 0 |
Net operating income |  |  |  |  |  |  |  |  |  | 39,250,000 | 38,695,000 |  | 39,367,000 |
Segment Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property owned | 544,628,000 |  |  |  | 613,775,000 |  |  |  |  | 544,628,000 | 613,775,000 |  |  |
Less accumulated depreciation | (121,892,000) |  |  |  | (138,270,000) |  |  |  |  | (121,892,000) | (138,270,000) |  |  |
Total property owned | 422,736,000 |  |  |  | 475,505,000 |  |  |  |  | 422,736,000 | 475,505,000 |  | 494,881,000 |
Commercial Healthcare [Member] | Segment Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate revenue |  |  |  |  |  |  |  |  |  | 65,258,000 | 61,975,000 |  | 64,511,000 |
Real estate expenses |  |  |  |  |  |  |  |  |  | 17,127,000 | 16,779,000 |  | 20,650,000 |
Gain on involuntary conversion |  |  |  |  |  |  |  |  |  | 0 | 0 |  | 0 |
Net operating income |  |  |  |  |  |  |  |  |  | 48,131,000 | 45,196,000 |  | 43,861,000 |
Segment Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property owned | 525,028,000 |  |  |  | 501,191,000 |  |  |  |  | 525,028,000 | 501,191,000 |  |  |
Less accumulated depreciation | (105,843,000) |  |  |  | (90,891,000) |  |  |  |  | (105,843,000) | (90,891,000) |  |  |
Total property owned | 419,185,000 |  |  |  | 410,300,000 |  |  |  |  | 419,185,000 | 410,300,000 |  | 421,524,000 |
Commercial-Industrial [Member] | Segment Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate revenue |  |  |  |  |  |  |  |  |  | 6,894,000 | 6,700,000 |  | 6,613,000 |
Real estate expenses |  |  |  |  |  |  |  |  |  | 2,043,000 | 1,871,000 |  | 1,142,000 |
Gain on involuntary conversion |  |  |  |  |  |  |  |  |  | 0 | 0 |  | 0 |
Net operating income |  |  |  |  |  |  |  |  |  | 4,851,000 | 4,829,000 |  | 5,471,000 |
Segment Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property owned | 55,375,000 |  |  |  | 125,772,000 |  |  |  |  | 55,375,000 | 125,772,000 |  |  |
Less accumulated depreciation | (10,198,000) |  |  |  | (23,688,000) |  |  |  |  | (10,198,000) | (23,688,000) |  |  |
Total property owned | 45,177,000 |  |  |  | 102,084,000 |  |  |  |  | 45,177,000 | 102,084,000 |  | 98,309,000 |
Commercial Retail [Member] | Segment Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate revenue |  |  |  |  |  |  |  |  |  | 13,831,000 | 13,498,000 |  | 12,326,000 |
Real estate expenses |  |  |  |  |  |  |  |  |  | 4,989,000 | 4,919,000 |  | 4,046,000 |
Gain on involuntary conversion |  |  |  |  |  |  |  |  |  | 0 | 1,232,000 |  | 274,000 |
Net operating income |  |  |  |  |  |  |  |  |  | 8,842,000 | 9,811,000 |  | 8,554,000 |
Segment Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property owned | 117,269,000 |  |  |  | 132,536,000 |  |  |  |  | 117,269,000 | 132,536,000 |  |  |
Less accumulated depreciation | (28,255,000) |  |  |  | (27,218,000) |  |  |  |  | (28,255,000) | (27,218,000) |  |  |
Total property owned | $ 89,014,000 |  |  |  | $ 105,318,000 |  |  |  |  | $ 89,014,000 | $ 105,318,000 |  | $ 92,856,000 |
[1] | (as revised)

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