COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Jul. 23, 2021
Loss Contingencies [Line Items]
Investment in real estate ventures	$ 545,491	$ 532,224
One and Two Commerce Square | Preferred Equity Investment
Loss Contingencies [Line Items]
Contractual obligation	20,000
Amount committed to date	9,500
Drexel Square
Loss Contingencies [Line Items]
Contractual obligation	6,600
Estimated potential additional contribution obligation	2,200
3151 Market Street [Member]
Loss Contingencies [Line Items]
Construction loan amount	52,200
Investment in real estate ventures	316,900
3025 JFK Venture
Loss Contingencies [Line Items]
Construction loan amount			$ 186,700
One Uptown Venture
Loss Contingencies [Line Items]
Limited payment guarantee, percent of principle balance (up to)			25.00%
One Uptown Venture | Carry Guarantee
Loss Contingencies [Line Items]
Limited payment guarantee, percent of principle balance (up to)			30.00%
Construction loan amount			$ 121,700
One Uptown Venture | Payment Guarantee
Loss Contingencies [Line Items]
Limited payment guarantee, percent of principle balance (up to)			15.00%
Construction loan amount			$ 85,000
Unconsolidated Real Estate Ventures
Loss Contingencies [Line Items]
Unconsolidated real estate venture debt at 100%, gross	$ 1,234,900