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FAIR VALUE MEASUREMENTS (Details) $ in Thousands | Oct. 31, 2016 USD ($) | Apr. 30, 2016 USD ($) property
--- | --- | ---
FINANCIAL LIABILITIES [Abstract] |  |
Mortgages payable | $ 779,568 | $ 812,393
Carrying Amount [Member] |  |
FINANCIAL ASSETS [Abstract] |  |
Cash and cash equivalents | 68,729 | 66,698
FINANCIAL LIABILITIES [Abstract] |  |
Other debt | 82,650 | 82,026
Lines of credit | 47,500 | 17,500
Mortgages payable | 783,790 | 817,324
Mortgages payable related to assets held for sale | 68,695 | 68,824
Fair Value [Member] |  |
FINANCIAL ASSETS [Abstract] |  |
Cash and cash equivalents | 68,729 | 66,698
FINANCIAL LIABILITIES [Abstract] |  |
Other debt | 82,650 | 82,026
Lines of credit | 47,500 | 17,500
Mortgages payable | 827,127 | 866,649
Mortgages payable related to assets held for sale | $ 70,286 | 78,690
Nonrecurring [Member] |  |
Fair Value Measurements on a Nonrecurring Basis [Abstract] |  |
Real estate held for sale |  | $ 6,650
Nonrecurring [Member] | Discontinued Operations, Held-for-sale [Member] |  |
Fair Value Measurements on a Nonrecurring Basis [Abstract] |  |
Number of real estate properties with fair value measured by individual market offer | property |  | 2
Nonrecurring [Member] | Level 3 [Member] |  |
Fair Value Measurements on a Nonrecurring Basis [Abstract] |  |
Real estate held for sale |  | $ 6,650

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