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REAL ESTATE INVESTMENTS AND MINIMUM FUTURE RENTALS - Real Estate Acquisitions (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2016 | Mar. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) item | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (interest in joint venture). |  |  |  | $ 12,686,000 |
Third Party Real Estate Acquisition Costs |  |  | $ 596,000 | 449,000 | $ 479,000
Contributions from non-controlling interests |  |  | 80,000 | 713,000 | 639,000
Payment to purchase of partner's interest |  |  |  | 6,300,000 |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  | 35,484,000 | 25,322,000 |
Building |  |  | 79,216,000 | 52,192,000 |
Building Improvements |  |  | 1,983,000 | 2,113,000 |
Intangible Lease Asset |  |  | 8,194,000 | 5,776,000 |
Intangible Lease Liability |  |  | (6,288,000) | (5,365,000) |
Total |  |  | 118,589,000 | 80,038,000 |
Restricted cash |  |  | $ 643,000 | $ 1,074,000 |
Weighted average amortization period for intangible lease assets |  |  | 9 years 3 months 18 days | 6 years 9 months 18 days |
Weighted average amortization period for intangible lease liabilities |  |  | 13 years | 6 years 4 months 24 days |
Above market lease accumulated amortization |  |  | $ 16,074,000 | $ 12,392,000 |
Below market lease accumulated amortization |  |  | 6,386,000 | 5,091,000 |
Net rental income due to amortization of the above/below market leases |  |  | 712,000 | 723,000 | 267,000
Future amortization income of below market leases |  |  |  |  |
Deferred rental income |  |  | 2,379,000 | 1,458,000 | 336,000
Minimum future contractual rents to be received |  |  |  |  |
2017 |  |  | 61,749,000 |  |
2018 |  |  | 60,473,000 |  |
2019 |  |  | 58,200,000 |  |
2020 |  |  | 55,632,000 |  |
2021 |  |  | 52,465,000 |  |
Thereafter |  |  | 232,241,000 |  |
Total |  |  | 520,760,000 |  |
Unbilled Rent Receivable |  |  |  |  |
Unbilled rent receivable (including $712 related to properties held-for-sale in 2015) |  |  | $ 13,797,000 | 13,577,000 |
Period during which amount of unbilled rent receivable is to be billed and received |  |  | 25 years |  |
Unbilled straight-line rent receivable written off |  |  | $ 2,060,000 | 120,000 |
Unbilled straight-line rent receivable written off related to lease termination fees |  |  |  | 477,000 |
Rental income |  |  |  |  |
Future amortization income of below market leases |  |  |  |  |
2017 |  |  | 1,763,000 |  |
2018 |  |  | 1,798,000 |  |
2019 |  |  | 1,785,000 |  |
2020 |  |  | 1,633,000 |  |
2021 |  |  | 1,598,000 |  |
Thereafter |  |  | 10,703,000 |  |
Total |  |  | 19,280,000 |  |
Amortization expense |  |  |  |  |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Amortization expense relating to origination costs |  |  | 3,612,000 | 3,467,000 | $ 2,430,000
Amortization of intangible lease assets |  |  |  |  |
2017 |  |  | 3,910,000 |  |
2018 |  |  | 3,676,000 |  |
2019 |  |  | 3,288,000 |  |
2020 |  |  | 3,054,000 |  |
2021 |  |  | 2,765,000 |  |
Thereafter |  |  | 11,265,000 |  |
Total |  |  | 27,958,000 |  |
Intangible lease asset - above market lease | Rental income |  |  |  |  |
Amortization of intangible lease assets |  |  |  |  |
2017 |  |  | 765,000 |  |
2018 |  |  | 688,000 |  |
2019 |  |  | 586,000 |  |
2020 |  |  | 560,000 |  |
2021 |  |  | 554,000 |  |
Thereafter |  |  | 1,534,000 |  |
Total |  |  | 4,687,000 |  |
Partial condemnation of land, Greenwood Village, Colorado |  |  |  |  |
Unbilled Rent Receivable |  |  |  |  |
Unbilled straight-line rent receivable written off |  |  | $ 7,000 |  |
Pathmark supermarket in Philadelphia, Pennsylvania |  |  |  |  |
Unbilled Rent Receivable |  |  |  |  |
Unbilled straight-line rent receivable written off |  |  |  | 89,000 |
Consolidated JV | Minimum |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Ownership interest in consolidated joint venture of the company (as a percent) |  |  | 85.00% |  |
Multi-tenant industrial facility, Greenville, South Carolina - 1 |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  | $ 8,100,000 |  |
Third Party Real Estate Acquisition Costs |  |  | 80,000 |  |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  | 693,000 |  |
Building |  |  | 6,718,000 |  |
Building Improvements |  |  | 175,000 |  |
Intangible Lease Asset |  |  | 514,000 |  |
Total |  |  | 8,100,000 |  |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  | 8,100,000 |  |
Multi-tenant industrial facility, Greenville, South Carolina - 2 |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  | 8,950,000 |  |
Third Party Real Estate Acquisition Costs |  |  | 81,000 |  |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  | 528,000 |  |
Building |  |  | 7,893,000 |  |
Building Improvements |  |  | 181,000 |  |
Intangible Lease Asset |  |  | 441,000 |  |
Intangible Lease Liability |  |  | (93,000) |  |
Total |  |  | 8,950,000 |  |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  | 8,950,000 |  |
Toro distribution facility, El Paso, Texas |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  | 23,695,000 |  |
Third Party Real Estate Acquisition Costs |  |  | 72,000 |  |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  | 3,691,000 |  |
Building |  |  | 17,525,000 |  |
Building Improvements |  |  | 379,000 |  |
Intangible Lease Asset |  |  | 2,100,000 |  |
Total |  |  | 23,695,000 |  |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  | 23,695,000 |  |
4 Advanced Auto retail locations, Ohio |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  | 6,523,000 |  |
Mortgage incurred |  |  | 4,300,000 |  |
Third Party Real Estate Acquisition Costs |  |  | 80,000 |  |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  | 653,000 |  |
Building |  |  | 5,012,000 |  |
Building Improvements |  |  | 189,000 |  |
Intangible Lease Asset |  |  | 912,000 |  |
Intangible Lease Liability |  |  | (243,000) |  |
Total |  |  | 6,523,000 |  |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  | 6,523,000 |  |
Land - The Briarbrook Village Apartments Wheaton, Illinois |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  | 10,530,000 |  |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  | 10,536,000 |  |
Total |  |  | 10,536,000 |  |
Capitalized transaction costs incurred with the asset acquisition |  |  | 6,000 |  |
Amount of mortgage to owner/operator |  |  | $ 39,411,000 |  |
Number of apartment units in the complex purchased | item |  |  | 342 |  |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  | $ 10,530,000 |  |
Burlington Coat and Micro Center retail stores, St. Louis Park, Minnesota |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  | 14,150,000 |  |
Third Party Real Estate Acquisition Costs |  |  | 74,000 |  |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  | 3,388,000 |  |
Building |  |  | 12,632,000 |  |
Building Improvements |  |  | 456,000 |  |
Intangible Lease Asset |  |  | 651,000 |  |
Intangible Lease Liability |  |  | (2,977,000) |  |
Total |  |  | 14,150,000 |  |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  | 14,150,000 |  |
Land - The Vue Apartments, Beachwood, Ohio |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  | 13,896,000 |  |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  | 13,901,000 |  |
Total |  |  | 13,901,000 |  |
Capitalized transaction costs incurred with the asset acquisition |  |  | 5,000 |  |
Amount of mortgage to owner/operator |  |  | $ 67,444,000 |  |
Number of apartment units in the complex purchased | item |  |  | 348 |  |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  | $ 13,896,000 |  |
Famous Footwear distribution facility, Lebanon, Tennessee |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  | 32,734,000 |  |
Mortgage incurred |  |  | 21,288,000 |  |
Third Party Real Estate Acquisition Costs |  |  | 195,000 |  |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  | 2,094,000 |  |
Building |  |  | 29,436,000 |  |
Building Improvements |  |  | 603,000 |  |
Intangible Lease Asset |  |  | 3,576,000 |  |
Intangible Lease Liability |  |  | (2,975,000) |  |
Total |  |  | 32,734,000 |  |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  | $ 32,734,000 |  |
Marston Park Plaza retail stores, Littleton, Colorado |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  |  | 17,485,000 |
Mortgage incurred |  |  |  | 11,853,000 |
Third Party Real Estate Acquisition Costs |  |  |  | 184,000 |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  |  | 6,005,000 |
Building |  |  |  | 10,109,000 |
Building Improvements |  |  |  | 700,000 |
Intangible Lease Asset |  |  |  | 1,493,000 |
Intangible Lease Liability |  |  |  | (822,000) |
Total |  |  |  | 17,485,000 |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  |  | 17,485,000 |
Marston Park Plaza retail stores, Littleton, Colorado | Consolidated JV |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Ownership interest in consolidated joint venture of the company (as a percent) |  |  | 90.00% |  |
Ownership interest in consolidated joint venture of non-controlling interest (as a percent) |  |  | 10.00% |  |
Contributions from non-controlling interests |  |  | $ 663,000 |  |
Interline Brands distribution facility, Louisville, Kentucky |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  |  | 4,400,000 |
Mortgage incurred |  |  |  | 2,640,000 |
Third Party Real Estate Acquisition Costs |  |  |  | 48,000 |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  |  | 578,000 |
Building |  |  |  | 3,622,000 |
Building Improvements |  |  |  | 105,000 |
Intangible Lease Asset |  |  |  | 95,000 |
Total |  |  |  | 4,400,000 |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  |  | 4,400,000 |
Land - The Meadows Apartments, Lakemoor, Illinois |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  | 9,300,000 | 9,300,000 |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  |  | 9,592,000 |
Total |  |  |  | 9,592,000 |
Capitalized transaction costs incurred with the asset acquisition |  |  | 292,000 |  |
Amount of mortgage to owner/operator |  |  | $ 43,824,000 |  |
Number of apartment units in the complex purchased | item |  |  | 496 |  |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  | $ 9,300,000 | 9,300,000 |
Represents the retail property located in Lincoln, Nebraska acquired by the entity. |  |  |  |  |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  |  | 3,768,000 |
Building |  |  |  | 11,262,000 |
Building Improvements |  |  |  | 570,000 |
Intangible Lease Asset |  |  |  | 922,000 |
Intangible Lease Liability |  |  |  | (3,929,000) |
Total |  |  |  | 12,593,000 |
Future amortization income of below market leases |  |  |  |  |
Contract price directly paid to the partner of unconsolidated joint venture |  | $ 2,636,000 |  |  |
payment made to underlying mortgage of the unconsolidated joint venture |  | $ 3,664,000 |  |  |
Represents the retail property located in Lincoln, Nebraska acquired by the entity. | Consolidated JV |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Percentage of equity method investments control obtained |  | 100.00% |  |  |
Future amortization income of below market leases |  |  |  |  |
Purchase price fair value adjustment |  | $ 960,000 |  |  |
Represents the retail property located in Lincoln, Nebraska acquired by the entity. | Unconsolidated joint ventures |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  |  | 6,300,000 |
Third Party Real Estate Acquisition Costs |  |  |  | 12,000 |
Percentage of equity method investments acquired |  | 50.00% | 50.00% |  |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Equity Method Investment Ownership Percentage Acquired |  | 50.00% | 50.00% |  |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  |  | 6,300,000 |
Archway Roofing industrial facility, Louisville, Kentucky |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  |  | 300,000 |
Third Party Real Estate Acquisition Costs |  |  |  | 15,000 |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  |  | 51,000 |
Building |  |  |  | 221,000 |
Building Improvements |  |  |  | 9,000 |
Intangible Lease Asset |  |  |  | 19,000 |
Total |  |  |  | 300,000 |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  |  | 300,000 |
JCIM - Industrial facility, McCalla, Alabama |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  |  | 16,618,000 |
Third Party Real Estate Acquisition Costs |  |  |  | 45,000 |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  |  | 1,588,000 |
Building |  |  |  | 14,503,000 |
Building Improvements |  |  |  | 179,000 |
Intangible Lease Asset |  |  |  | 470,000 |
Intangible Lease Liability |  |  |  | (122,000) |
Total |  |  |  | 16,618,000 |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  |  | 16,618,000 |
FedEx And CHEP USA distribution facility, Delport Located In St Louis Missouri |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  |  | 19,050,000 |
Mortgage incurred |  |  |  | 12,383,000 |
Third Party Real Estate Acquisition Costs |  |  |  | 81,000 |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  |  | 3,728,000 |
Building |  |  |  | 12,456,000 |
Building Improvements |  |  |  | 550,000 |
Intangible Lease Asset |  |  |  | 2,777,000 |
Intangible Lease Liability |  |  |  | (461,000) |
Total |  |  |  | 19,050,000 |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  |  | 19,050,000 |
Subtotals |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Contract purchase price (real estate) |  |  | $ 118,578,000 | 73,453,000 |
Third Party Real Estate Acquisition Costs |  |  | 596,000 | 449,000 |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  |  | 25,310,000 |
Building |  |  |  | 52,173,000 |
Building Improvements |  |  |  | 2,113,000 |
Intangible Lease Asset |  |  |  | 5,776,000 |
Intangible Lease Liability |  |  |  | (5,334,000) |
Total |  |  |  | 80,038,000 |
Future amortization income of below market leases |  |  |  |  |
Payments to Acquire Real Estate |  |  | 118,578,000 | 73,453,000 |
Other |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Third Party Real Estate Acquisition Costs |  |  | $ 14,000 | 64,000 |
Allocation of purchase price for the company's real estate acquisitions |  |  |  |  |
Land |  |  |  | 12,000 |
Building |  |  |  | 19,000 |
Intangible Lease Liability |  |  |  | $ (31,000) |
Deptford, New Jersey | Consolidated JV |  |  |  |  |
Real Estate Acquisitions |  |  |  |  |
Percentage of equity method investments control obtained | 100.00% |  |  |  |

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