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REAL ESTATE INVESTMENTS - Capitalized Construction Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Property, Plant and Equipment [Line Items] |  |  |
Internal direct construction costs capitalized related to development of properties and land holdings | $ 8,366 | $ 7,431 | $ 6,964
Capitalized interest | 4,600 | 3,200 | 3,600
Development |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Internal direct construction costs capitalized related to development of properties and land holdings | 4,802 | 3,047 | 3,185
Redevelopment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Internal direct construction costs capitalized related to development of properties and land holdings | 543 | 775 | 968
Tenant Improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Internal direct construction costs capitalized related to development of properties and land holdings | $ 3,021 | $ 3,609 | $ 2,811

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- Definition Amount of interest capitalized during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
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