Net Assets in Liquidation - Schedule of Cash and Cash Equivalent and Marketable Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017	Dec. 15, 2011
Cash and Cash Equivalents [Line Items]
Residual Wind-Down Assets	$ 200		$ 42,800
Total	507,700	$ 526,800
Cash and Cash Equivalents and Marketable Securities [Member]
Cash and Cash Equivalents [Line Items]
Distributable Cash (including associated Dividend Cash)	484,510	498,549
Other Administrative Cash	21,200	14,541
Administrative Fund	1,717	1,743
Residual Wind-Down Assets	171	11,713	$ 40,000
Funds for Indenture Trustee / Fiscal Paying Agent Costs	148	226
Total	$ 507,746	$ 526,772