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COMMITMENTS AND CONTINGENCIES (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Apr. 30, 2014 sqft Property Unit | Apr. 30, 2013
Real Estate Properties [Line Items] |  |  |
Number of properties under operating ground and air rights lease | 12 |  |
Rent payable per year under ground lease | $ 500,000 |  |
Operating Leases, Future Minimum Payments [Abstract] |  |  |
2015 | 506,000 |  |
2016 | 475,000 |  |
2017 | 449,000 |  |
2018 | 449,000 |  |
2019 | 449,000 |  |
Thereafter | 21,213,000 |  |
Total | 23,541,000 |  |
Tenant improvements | 9,700,000 |  |
Commitment period for tenant improvements (in months) | 12 months |  |
Number of Properties subject to purchase options. | 15 |  |
Total property cost subject to purchase options | 120,500,000 |  |
Total gross rental revenue from properties subject to purchase options | 9,800,000 |  |
Property Cost and Gross Rental Revenue [Abstract] |  |  |
Total property cost subject to purchase options | 120,500,000 |  |
Total gross rental revenue from properties subject to purchase options | 9,800,000 |  |
Number of properties subject to restrictions on taxable dispositions | 110 |  |
Area of a real estate property (in square feet) | 5,500,000 |  |
Number of apartment units subject to restrictions on taxable dispositions | 4,953 |  |
Real estate investment amount of properties (net of accumulated depreciation) | 814,500,000 |  |
Redemption basis | 1:1 |  |
Minimum redemption holding period (in years) | 1 year |  |
Number of consecutive trading days for valuation (in days) | 10 days |  |
Aggregate redemption value of UPREIT Units of operating partnership owned by limited partners | 185,700,000 |  | 209,700,000
Area of property (square feet) | 5,500,000 |  |
Anticipated Total Cost | 234,990,000 |  |
Project costs incurred to date | 116,096,000 | [1] |
Loans Closed or Committed | 142,828,000 |  |
Minimum [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Lease term of property (in years) | 1 year 6 months |  |
Lease expiration date | Oct. 31, 2015 |  |
Number of renewal options (in leases) | 6 |  |
Maximum [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Lease term of property (in years) | 87 years |  |
Lease expiration date | Oct. 31, 2100 |  |
Number of renewal options (in leases) | 12 |  |
Multi Family Residential [Member] | Arcata Apartments, Golden Valley, MN [Member] |  |  |
Property Cost and Gross Rental Revenue [Abstract] |  |  |
Number of apartment units | 165 |  |
Anticipated Total Cost | 33,448,000 |  |
Project costs incurred to date | 13,018,000 | [1] |
Loans Closed or Committed | 24,250,000 |  |
Estimated quarter for completion | 3 |  |
Estimated year for completion | 2015 |  |
Multi Family Residential [Member] | Cardinal Point Grand Forks Nd [Member] |  |  |
Property Cost and Gross Rental Revenue [Abstract] |  |  |
Number of apartment units | 251 |  |
Anticipated Total Cost | 40,042,000 |  |
Project costs incurred to date | 6,829,000 | [1] |
Loans Closed or Committed | 24,500,000 |  |
Estimated quarter for completion | 1 |  |
Estimated year for completion | 2016 |  |
Multi Family Residential [Member] | Chateau II - Minot, ND [Member] |  |  |
Property Cost and Gross Rental Revenue [Abstract] |  |  |
Number of apartment units | 72 | [2] |
Anticipated Total Cost | 14,711,000 | [2] |
Project costs incurred to date | 2,098,000 | [1],[2] |
Loans Closed or Committed | 0 | [2] |
Estimated quarter for completion | 4 | [2] |
Estimated year for completion | 2015 | [2] |
Multi Family Residential [Member] | Commons at Southgate - Minot, ND [Member] |  |  |
Property Cost and Gross Rental Revenue [Abstract] |  |  |
Number of apartment units | 233 | [3] |
Anticipated Total Cost | 37,201,000 | [3] |
Project costs incurred to date | 28,065,000 | [1],[3] |
Loans Closed or Committed | 24,480,000 | [3] |
Estimated quarter for completion | 2 | [3] |
Estimated year for completion | 2015 | [3] |
Interest in joint venture (in hundredths) | 51.00% | [3] |
Multi Family Residential [Member] | Cypress Court II - St. Cloud, MN [Member] |  |  |
Property Cost and Gross Rental Revenue [Abstract] |  |  |
Number of apartment units | 66 | [4] |
Anticipated Total Cost | 7,028,000 | [4] |
Project costs incurred to date | 1,580,000 | [1],[4] |
Loans Closed or Committed | 4,200,000 | [4] |
Estimated quarter for completion | 3 | [4] |
Estimated year for completion | 2015 | [4] |
Interest in joint venture (in hundredths) | 86.00% | [4] |
Multi Family Residential [Member] | Dakota Commons - Williston, ND [Member] |  |  |
Property Cost and Gross Rental Revenue [Abstract] |  |  |
Number of apartment units | 44 |  |
Anticipated Total Cost | 10,736,000 |  |
Project costs incurred to date | 9,013,000 | [1] |
Loans Closed or Committed | 0 |  |
Estimated quarter for completion | 1 |  |
Estimated year for completion | 2015 |  |
Multi Family Residential [Member] | Other [Member] |  |  |
Property Cost and Gross Rental Revenue [Abstract] |  |  |
Number of apartment units |  |  |
Anticipated Total Cost |  |  |
Project costs incurred to date | 2,496,000 | [1] |
Loans Closed or Committed |  |  |
Estimated quarter for completion |  |  |
Estimated year for completion |  |  |
Multi Family Residential [Member] | RED 20 - Minneapolis, MN [Member] |  |  |
Property Cost and Gross Rental Revenue [Abstract] |  |  |
Area of a real estate property (in square feet) | 10,625 | [5] |
Area of property (square feet) | 10,625 | [5] |
Number of apartment units | 130 | [5] |
Anticipated Total Cost | 29,462,000 | [5] |
Project costs incurred to date | 13,980,000 | [1],[5] |
Loans Closed or Committed | 21,726,000 | [5] |
Estimated quarter for completion | 3 | [5] |
Estimated year for completion | 2015 | [5] |
Interest in joint venture (in hundredths) | 58.60% | [5] |
Multi Family Residential [Member] | Renaissance Heights I Apartments, Williston, ND [Member] |  |  |
Property Cost and Gross Rental Revenue [Abstract] |  |  |
Number of apartment units | 288 | [6] |
Anticipated Total Cost | 62,362,000 | [6] |
Project costs incurred to date | 39,017,000 | [1],[6] |
Loans Closed or Committed | 43,672,000 | [6] |
Estimated quarter for completion | 4 | [6] |
Estimated year for completion | 2015 | [6] |
Interest in joint venture (in hundredths) | 70.00% | [6] |
Costs related to development projects placed in service in phases. | $ 11,500,000 | [6] |
[1] | Includes costs related to development projects that are placed in service in phases (Renaissance Heights I - $11.5 million).
[2] | On December 5, 2013, this development project was destroyed by fire. As of April 30, 2014, $6.1 million of expected insurance proceeds were included in accounts receivable on the Company’s consolidated balance sheet. See Note 2 for additional information.
[3] | The Company is an approximately 51% partner in the joint venture entity constructing this project; the anticipated total cost amount given is the total cost to the joint venture entity.
[4] | The Company is an approximately 86.1% partner in the joint venture entity constructing this project; the anticipated total cost amount given is the total cost to the joint venture entity.
[5] | The Company is an approximately 58.6% partner in the joint venture entity constructing this project; the anticipated total cost amount given is the total cost to the joint venture entity.
[6] | The Company is an approximately 70% partner in the joint venture entity constructing this project; the anticipated total cost amount given is the total cost to the joint venture entity.

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