Consolidated Statements of Changes in Net Assets Liquidation Basis Unaudited - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Net assets in liquidation, beginning of year	$ 327,927,000
Changes in net assets in liquidation
Change in liquidation value of investments in real estate	(1,519,000)	$ (21,900,000)
Change in liquidation value of loans receivable		100,000
Change in liquidation value of equity investments	(11,049,000)	3,142,000
Remeasurement of assets and liabilities	2,581,000	2,756,000
Remeasurement of non-controlling interests		1,067,000
Liquidating distributions to Unitholders/Common shareholders	(54,727,000)	(173,019,000)
Net assets in liquidation, end of year	264,441,000	327,927,000
Liquidation Value [Member]
Net assets in liquidation, beginning of year	327,927,000	516,396,000
Changes in net assets in liquidation
Change in liquidation value of investments in real estate	(1,519,000)	(21,900,000)
Change in liquidation value of loans receivable		100,000
Change in liquidation value of equity investments	(11,049,000)	3,142,000
Remeasurement of assets and liabilities	3,263,000	2,141,000
Remeasurement of non-controlling interests	546,000	1,067,000
Net decrease in liquidation value	(8,759,000)	(15,450,000)
Liquidating distributions to Unitholders/Common shareholders	(54,727,000)	(173,019,000)
Changes in net assets in liquidation	(63,486,000)	(188,469,000)
Net assets in liquidation, end of year	$ 264,441,000	$ 327,927,000