Statements of Changes in Net Assets in Liquidation (Liquidation Basis) - Liquidation Basis of Accounting [Member] - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Net Assets in Liquidation, beginning of year	$ 464,803	$ 488,213	$ 611,773
Increase (decrease) in net assets in liquidation:
Additions to reserves for Expected Costs of Liquidation and Residual Wind-Down Claims and Costs (Note 7)	(9,511)	(33,957)	(12,360)
Net reversal of liquidating distributions (liquidating distributions) (Note 5)	0	6,947	(115,374)
Reversal (incurrence) of contingent settlement obligation (Note 4)	15,000	(15,000)
Dividends and interest income (Notes 3 and 4)	23,852	18,600	4,174
Other income (Note 3)	360
Net increase (decrease) in net assets in liquidation	29,701	(23,410)	(123,560)
Net Assets in Liquidation, end of year	$ 494,504	$ 464,803	$ 488,213