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NONCONTROLLING INTERESTS (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) property Joint_Venture
Consolidated Joint Venture
Noncontrolling Interest [Line Items]
Number of consolidated joint ventures | Joint_Venture	5
Consolidated Joint Venture | Isla Vista, CA | Student Housing
Noncontrolling Interest [Line Items]
Number of real estate properties | property	40
Property book value	$ 82.4
Consolidated Joint Venture | Richmond, VA | Office Building
Noncontrolling Interest [Line Items]
Number of real estate properties | property	11
Property book value	$ 72.6
Consolidated Joint Venture | Ewing, NJ | Single-Tenant Office Building
Noncontrolling Interest [Line Items]
Property book value	26.6
Consolidated Joint Venture | Lithia Springs, GA | Industrial
Noncontrolling Interest [Line Items]
Property book value	23.5
Consolidated Joint Venture | Miami, FL | Apartment Building
Noncontrolling Interest [Line Items]
Property book value	$ 37.2
Minimum | Consolidated Joint Venture | Consolidated Joint Ventures
Noncontrolling Interest [Line Items]
Noncontrolling interest ownership	10.00%
Maximum | Consolidated Joint Venture | Consolidated Joint Ventures
Noncontrolling Interest [Line Items]
Noncontrolling interest ownership	29.40%
Operating Partnership
Noncontrolling Interest [Line Items]
Decrease in noncontrolling interest in Operating Partnership	$ (0.3)

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