Net Assets in Liquidation - Schedule of Cash and Cash Equivalent and Marketable Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 15, 2011
Cash and Cash Equivalents [Line Items]
Residual Wind-Down Assets	$ 200	$ 42,800
Funds for Indenture Trustee / Fiscal Paying Agent Costs	100
Total	452,500
Cash and Cash Equivalents and Marketable Securities [Member]
Cash and Cash Equivalents [Line Items]
Distributable Cash (including associated Dividend Cash)	419,594
Other Administrative Cash	31,425
Administrative Fund	1,213
Residual Wind-Down Assets	176	$ 40,000
Funds for Indenture Trustee / Fiscal Paying Agent Costs	108
Total	$ 452,516