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DEBT OBLIGATIONS (Details) | 1 Months Ended | 2 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2016 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) item | Dec. 31, 2014 USD ($)
DEBT OBLIGATIONS |  |  |  |
Aggregate carrying value of real estate investments |  |  | $ 647,373,000 | $ 581,425,000
Accumulated depreciation |  |  | 85,116,000 | 76,575,000
Repayment of the outstanding debt |  |  |  |
Total |  |  | $ 334,428,000 | $ 292,049,000
Mortgages payable |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Number of debt instruments outstanding | item |  |  | 65 |
Aggregate carrying value of real estate investments |  |  | $ 510,717,000 |
Accumulated depreciation |  |  | $ 61,079,000 |
Weighted average interest rate (as a percent) |  |  | 4.72% | 5.02%
Repayment of the outstanding debt |  |  |  |
2016 |  |  | $ 31,146,000 |
2017 |  |  | 31,005,000 |
2018 |  |  | 19,099,000 |
2019 |  |  | 17,398,000 |
2020 |  |  | 12,987,000 |
Thereafter |  |  | 222,793,000 |
Total |  |  | $ 334,428,000 |
Mortgages payable | Minimum | Interest rate swap |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Annual fixed interest rate (as a percent) |  |  | 3.13% |
Mortgages payable | Maximum | Interest rate swap |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Annual fixed interest rate (as a percent) |  |  | 7.81% |
Mortgage loan on eight properties |  |  |  |
Repayment of the outstanding debt |  |  |  |
2016 |  |  | $ 176,000 |
2017 |  |  | $ 7,638,000 |
Subsequent event | Mortgages payable |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Annual fixed interest rate of refinanced debt (as a percent) | 6.10% |  |  |
Weighted average interest rate of paid off debt (as a percent) |  | 5.30% |  |
Repayment of the outstanding debt |  |  |  |
Effective pay off |  | $ 8,553,000 |  |
Debt instrument refinanced | $ 12,200,000 |  |  |
Subsequent event | New debt refinancing |  |  |  |
DEBT OBLIGATIONS |  |  |  |
Annual fixed interest rate (as a percent) | 3.38% | 3.38% |  |
Repayment of the outstanding debt |  |  |  |
Face value of debt | $ 18,000,000 | $ 18,000,000 |  |

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