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OPERATING SEGMENTS (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Apr. 30, 2016 Segment | Apr. 30, 2015 USD ($) Segment | Apr. 30, 2014 USD ($) | Apr. 30, 2013 USD ($) | Apr. 30, 2012 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments | Segment |  | 5 |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |
Real estate revenue |  | $ 200,995 | $ 185,379 | $ 169,733 |
Real estate expenses |  | 73,833 | 69,805 | 62,170 |
Gain on involuntary conversion |  | 0 | 2,480 | 5,084 |
Net operating income |  | 127,162 | 118,054 | 112,647 |
TRS senior housing revenue, net of expense |  | 523 | 296 |  |
Depreciation/amortization |  | (51,775) | (50,069) | (42,430) |
Administrative expenses |  | (11,824) | (10,743) | (8,494) |
Other expenses |  | (2,010) | (2,129) | (2,171) |
Impairment of real estate investments |  | (4,663) | (7,700) |  |
Interest expense |  | (40,071) | (39,619) | (40,441) |
Interest and other income |  | 2,961 | 2,148 | 732 |
Income (loss) before gain (loss) on sale of real estate and other investments and income from discontinued operations |  | 20,298 | 10,238 | 19,843 |
Gain (Loss) on sale of real estate and other investments |  | 6,093 | (51) | 0 |
Income (loss) from continuing operations |  | 26,391 | 10,187 | 19,843 |
Income (loss) from discontinued operations |  | 2,293 | (27,127) | 10,129 |
NET INCOME (LOSS) |  | 28,684 | (16,940) | 29,972 |
Segment Assets [Abstract] |  |  |  |  |
Property owned |  | 1,546,367 | 1,450,216 |  |
Less accumulated depreciation |  | (313,308) | (302,405) |  |
Total property owned |  | 1,233,059 | 1,147,811 |  |
Assets held for sale and assets of discontinued operations |  | 463,103 | 457,307 |  |
Cash and cash equivalents |  | 48,970 | 47,267 | 94,133 | $ 39,989
Other investments |  | 329 | 329 |  |
Receivables and other assets |  | 7,255 | 89,034 |  |
Development in progress |  | 153,994 | 104,609 |  |
Unimproved land |  | 25,827 | 22,864 |  |
TOTAL ASSETS |  | 1,997,837 | 1,869,221 |  |
Subsequent Event [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments | Segment | 3 |  |  |  |
Multi-Family Residential [Member] | Operating Segments [Member] |  |  |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |
Real estate revenue |  | 118,526 | 102,059 | 89,923 |
Real estate expenses |  | 51,172 | 46,138 | 38,223 |
Gain on involuntary conversion |  |  | 2,480 | 3,852 |
Net operating income |  | 67,354 | 58,401 | 55,552 |
Segment Assets [Abstract] |  |  |  |  |
Property owned |  | 946,520 | 753,731 |  |
Less accumulated depreciation |  | (180,414) | (158,100) |  |
Total property owned |  | 766,106 | 595,631 |  |
Healthcare [Member] | Operating Segments [Member] |  |  |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |
Real estate revenue |  | 65,828 | 64,887 | 61,625 |
Real estate expenses |  | 16,937 | 16,889 | 16,529 |
Gain on involuntary conversion |  |  | 0 | 0 |
Net operating income |  | 48,891 | 47,988 | 45,096 |
Segment Assets [Abstract] |  |  |  |  |
Property owned |  | 495,021 | 522,135 |  |
Less accumulated depreciation |  | (112,515) | (105,376) |  |
Total property owned |  | 382,506 | 416,759 |  |
Industrial [Member] | Operating Segments [Member] |  |  |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |
Real estate revenue |  | 6,491 | 6,894 | 6,700 |
Real estate expenses |  | 1,536 | 2,043 | 1,871 |
Gain on involuntary conversion |  |  | 0 | 0 |
Net operating income |  | 4,955 | 4,851 | 4,829 |
Segment Assets [Abstract] |  |  |  |  |
Property owned |  | 60,611 | 55,375 |  |
Less accumulated depreciation |  | (11,256) | (10,198) |  |
Total property owned |  | 49,355 | 45,177 |  |
Other Segments [Member] | Operating Segments [Member] |  |  |  |  |
Segment revenues and net operating income [Abstract] |  |  |  |  |
Real estate revenue |  | 10,150 | 11,539 | 11,485 |
Real estate expenses |  | 4,188 | 4,725 | 5,547 |
Gain on involuntary conversion |  |  | 0 | 1,232 |
Net operating income |  | 5,962 | 6,814 | $ 7,170 |
Segment Assets [Abstract] |  |  |  |  |
Property owned |  | 44,215 | 118,975 |  |
Less accumulated depreciation |  | (9,123) | (28,731) |  |
Total property owned |  | $ 35,092 | $ 90,244 |  |

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