Net Assets in Liquidation - Schedule of Cash and Cash Equivalent and Marketable Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Feb. 01, 2019	Mar. 31, 2018	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	505,100		$ 507,700
Cash and Cash Equivalents and Marketable Securities [Member]
Cash and Cash Equivalents [Line Items]
Distributable Cash (including associated Dividend Cash)	472,070		484,510
Other Administrative Cash	31,445	$ 13,720	21,200
Administrative Fund	1,246		1,717
Residual Wind-Down Assets	175		171	$ 40,000
Funds for Indenture Trustee / Fiscal Paying Agent Costs	117		148
Total	$ 505,053		$ 507,746