Net Assets in Liquidation - Schedule of Cash and Cash Equivalent and Marketable Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 15, 2011
Cash and Cash Equivalents [Line Items]
Residual Wind-Down Assets	$ 200	$ 42,800
Total	504,600
Cash and Cash Equivalents and Marketable Securities [Member]
Cash and Cash Equivalents [Line Items]
Distributable Cash (including associated Dividend Cash)	484,477
Other Administrative Cash	18,583
Administrative Fund	1,279
Residual Wind-Down Assets	174	$ 40,000
Funds for Indenture Trustee / Fiscal Paying Agent Costs	136
Total	$ 504,649