NET ASSETS IN LIQUIDATION - Additional Information (Details) $ / shares in Units, $ in Millions		2 Months Ended	3 Months Ended
	Mar. 05, 2020 USD ($) $ / shares	Mar. 31, 2020 USD ($) ft² $ / shares	Mar. 31, 2020 USD ($) ft² $ / shares
Assets in Liquidation [Abstract]
Decrease in assets, net		$ (211.9)
Initial liquidating distribution (in dollars per share) | $ / shares	$ 0.75
Aggregate cash distributions	$ 138.9
Additional estimated liquidation distribution (in dollars per share) | $ / shares		$ 2.66	$ 2.66
Real Estate Properties [Line Items]
Percentage of real estate occupied		81.00%	81.00%
Office Properties
Assets in Liquidation [Abstract]
Decrease in real estate property values		$ (68.2)	$ (68.2)
Office Properties | Union Bank Plaza
Real Estate Properties [Line Items]
Decrease in real estate property sales price		$ (28.5)
Percentage of real estate occupied		82.00%	82.00%
Office Properties | Granite Tower
Real Estate Properties [Line Items]
Decrease in real estate property sales price		$ (24.5)
Percentage of real estate occupied		96.00%	96.00%
Area of real estate property occupied | ft²		85,000	85,000
Percent of vacated area in real estate property during remainder of year		14.00%
Percent of real estate property occupied by oil and gas industry tenants		61.00%	61.00%
Other Properties
Real Estate Properties [Line Items]
Decrease in real estate property sales price		$ (15.2)