Liability for Estimated Costs in Excess of Estimated Receipts During Liquidation - Schedule of Changes in Liability for Estimated Costs in Excess of Estimated Receipts During Liquidation (Detail)	6 Months Ended
	Jun. 30, 2015 USD ($)
Business Acquisition [Line Items]
Total liability for estimated costs in excess of estimated receipts during liquidation, beginning balance	$ (31,253,000)
Cash Payments (Receipts)	(1,092,000)
Remeasurement of Assets and Liabilities	2,620,000
Total liability for estimated costs in excess of estimated receipts during liquidation, ending balance	(32,781,000)
Corporate Expenditures [Member]
Business Acquisition [Line Items]
Remeasurement of Assets and Liabilities	1,721,000
Assets [Member]
Business Acquisition [Line Items]
Estimated net inflows from investments in real estate, loans receivable and secured financing receivable, beginning balance	25,169,000
Cash Payments (Receipts)	7,428,000
Remeasurement of Assets and Liabilities	865,000
Estimated net inflows from investments in real estate, loans receivable and secured financing receivable, ending balance	16,876,000
Liability [Member]
Business Acquisition [Line Items]
Total liability for estimated costs, beginning balance	(56,422,000)
Cash Payments (Receipts)	8,520,000
Remeasurement of Assets and Liabilities	(1,755,000)
Total liability for estimated costs, ending balance	(49,657,000)
Liability [Member] | Sales Costs [Member]
Business Acquisition [Line Items]
Total liability for estimated costs, beginning balance	(11,840,000)
Cash Payments (Receipts)	578,000
Remeasurement of Assets and Liabilities	(34,000)
Total liability for estimated costs, ending balance	(11,296,000)
Liability [Member] | Corporate Expenditures [Member]
Business Acquisition [Line Items]
Total liability for estimated costs, beginning balance	(44,582,000)
Cash Payments (Receipts)	7,942,000
Remeasurement of Assets and Liabilities	(1,721,000)
Total liability for estimated costs, ending balance	$ (38,361,000)