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) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Remeasurement of Assets and Liabilities	$ (1,676)	$ 2,620
Liquidation Value [Member]
Business Acquisition [Line Items]
Total liability for estimated costs in excess of estimated receipts during liquidation, beginning balance	(29,297)	(31,253)
Cash Payments (Receipts)	(3,051)	1,092
Remeasurement of Assets and Liabilities	(1,676)	(2,620)
Total liability for estimated costs in excess of estimated receipts during liquidation, ending balance	(24,570)	(32,781)
Liquidation Value [Member] | Assets [Member]
Business Acquisition [Line Items]
Estimated net inflows from investments in real estate, loans receivable and secured financing receivable, beginning balance	10,523	25,169
Cash Payments (Receipts)	3,293	(7,428)
Remeasurement of Assets and Liabilities	1,579	(865)
Estimated net inflows from investments in real estate, loans receivable and secured financing receivable, ending balance	5,651	16,876
Liability [Member] | Liquidation Value [Member]
Business Acquisition [Line Items]
Total liability for estimated costs, beginning balance	(39,820)	(56,422)
Cash Payments (Receipts)	6,344	8,520
Remeasurement of Assets and Liabilities	3,255	1,755
Total liability for estimated costs, ending balance	(30,221)	(49,657)
Liability [Member] | Liquidation Value [Member] | Sales Costs [Member]
Business Acquisition [Line Items]
Total liability for estimated costs, beginning balance	(5,986)	(11,840)
Cash Payments (Receipts)	2,387	578
Remeasurement of Assets and Liabilities	285	(34)
Total liability for estimated costs, ending balance	(3,314)	(11,296)
Liability [Member] | Liquidation Value [Member] | Corporate Expenditures [Member]
Business Acquisition [Line Items]
Total liability for estimated costs, beginning balance	(33,834)	(44,582)
Cash Payments (Receipts)	3,957	7,942
Remeasurement of Assets and Liabilities	2,970	(1,721)
Total liability for estimated costs, ending balance	$ (26,907)	$ (38,361)