Net Assets in Liquidation - Additional Information (Detail) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Reorganizations [Abstract]
Increase (Decrease) in net assets on liquidation	$ (3,697,000)	$ 2,466,000
Change in liquidation value of investments in real estate	(7,592,000)	3,975,000
Change in estimated liability for non-controlling interests	424,000	(400,000)
Decrease in estimated receipts during liquidation	2,544,000	(2,792,000)
Change in liquidation value of equity investments	$ 1,775,000	2,733,000
Loan securities		918,000
Liquidation distribution per share	$ 14.08
Liquidation date, expected completion	Dec. 31, 2015
Net assets in liquidation	$ 512,699,000	$ 597,170,000	$ 516,396,000	$ 594,704,000
Additional cumulative liquidating distributions to holders of Common Shares	$ 163,915,000		$ 163,915,000
Additional cumulative liquidating distribution per share	$ 4.50		$ 4.50
Cumulative liquidating distribution per share	$ 18.58		$ 18.68
Common shares, outstanding	36,425,084		36,425,084