Net Assets in Liquidation - Schedule of Cash and Cash Equivalent and Marketable Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016	Dec. 15, 2011
Cash and Cash Equivalents [Line Items]
Residual Wind-Down Assets	$ 11,900		$ 42,800
Total	526,800	$ 665,500
Cash and Cash Equivalents and Marketable Securities [Member]
Cash and Cash Equivalents [Line Items]
Distributable Cash (including associated Dividend Cash)	498,549	620,866
Residual Wind-Down Assets	11,713	22,003	$ 40,000
Other Administrative Cash	14,541	13,533
Administrative Fund	1,743	8,226
Funds for Indenture Trustee/Fiscal Paying Agent Costs	226	311
Other		594
Total	$ 526,772	$ 665,533