Net Assets in Liquidation - Schedule of Cash and Cash Equivalent and Marketable Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 15, 2011
Cash and Cash Equivalents [Line Items]
Residual Wind-Down Assets	$ 200	$ 42,800
Total	510,900
Cash and Cash Equivalents and Marketable Securities [Member]
Cash and Cash Equivalents [Line Items]
Distributable Cash (including associated Dividend Cash)	498,118
Residual Wind-Down Assets	160	$ 40,000
Other Administrative Cash	10,678
Administrative Fund	1,724
Funds for Indenture Trustee / Fiscal Paying Agent Costs	204
Total	$ 510,884