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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) ft² in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 USD ($) ft² property mall | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) ft² property mall | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Jan. 01, 2019 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Impairment loss on real estate |  |  |  |  |  |  |  |  | $ 5,574,000 | $ 5,637,000 | $ 0 |
Term of share-based compensation awards |  |  |  |  |  |  |  |  | 10 years |  |  |
Area of real estate property (in sq ft) | ft² | 16,300 |  |  |  |  |  |  |  | 16,300 |  |  |
Revenues | $ 100,923,000 | $ 112,214,000 | $ 101,970,000 | $ 99,053,000 | $ 97,376,000 | $ 94,101,000 | $ 89,501,000 | $ 126,064,000 | $ 414,160,000 | 407,042,000 | $ 325,976,000 |
Number of properties subject to lease | property | 24 |  |  |  |  |  |  |  | 24 |  |  |
Capitalized internal leasing overhead |  |  |  |  |  |  |  |  | $ 700,000 |  |  |
The Home Depot |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of malls | property | 7 |  |  |  |  |  |  |  | 7 |  |  |
Area of real estate property (in sq ft) | ft² | 920 |  |  |  |  |  |  |  | 920 |  |  |
Customer Concentration Risk | Sales Revenue, Net | The Home Depot |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  | 5.50% |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 22,600,000 |  |  |
Puerto Rico |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of malls | mall | 2 |  |  |  |  |  |  |  | 2 |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives of real estate property |  |  |  |  |  |  |  |  | 3 years |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives of real estate property |  |  |  |  |  |  |  |  | 40 years |  |  |
Revolving Credit Facility | Revolving Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amounts drawn under credit facility | $ 0 |  |  |  |  |  |  |  | $ 0 |  |  |
Eatontown, NJ | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Impairment loss on real estate |  |  |  |  |  |  |  |  |  | $ 3,500,000 |  |
Accounting Standards Update 2016-02 [Member] | Subsequent Event | Scenario, Forecast |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Lease liability |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000

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