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DEBT (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Oct. 31, 2017 USD ($) loan | Apr. 30, 2017 USD ($)
Aggregate amount of required future principal payments on mortgages payable [Abstract] |  |
Total payments | $ 655,903 | $ 661,960
Mortgages Payable [Member] |  |
Debt Instrument [Line Items] |  |
Mortgages maturity date range, end | Jul. 01, 2036 |
Number of loans in default | loan | 0 |
Fixed rate mortgages | $ 593,900 | 629,500
Variable rate mortgages | $ 65,100 | $ 57,700
Weighted average interest rate (in hundredths) | 4.67% | 4.71%
Mortgage indebtness | $ 659,000 |
Aggregate amount of required future principal payments on mortgages payable [Abstract] |  |
2018 (remainder) | 21,398 |
2019 | 100,313 |
2020 | 92,258 |
2021 | 128,352 |
2022 | 86,812 |
Thereafter | 229,832 |
Total payments | $ 658,965 |
Mortgages Payable [Member] | Minimum [Member] |  |
Debt Instrument [Line Items] |  |
Interest rate on mortgages payable (in hundredths) | 3.47% |
Mortgages Payable [Member] | Maximum [Member] |  |
Debt Instrument [Line Items] |  |
Interest rate on mortgages payable (in hundredths) | 6.66% |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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