Condensed Statements of Cash Flows (Liquidation Basis) - Liquidation Basis of Accounting [Member] - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from (used in) operating activities
Cash receipts from interest and dividends	$ 946	$ 457
Cash paid for professional fees, governance costs and other administrative costs	(3,210)	(3,304)
Cash paid for Residual Wind-Down Claims and Costs	(11,544)	(2,556)
Cash receipts for refunds	193
Cash paid for distributions		(98)
Net cash flows used in operating activities	(13,615)	(5,501)
Cash flows from (used in) investing activities
Cash used to purchase marketable securities	(1,176,908)	(1,495,833)
Cash from maturities and sales of marketable securities	1,189,519	1,502,643
Net cash flows from investing activities	12,611	6,810
Net (decrease) increase in cash and cash equivalents	(1,004)	1,309
Cash and cash equivalents, beginning of period	4,320	4,410
Cash and cash equivalents, end of period	$ 3,316	$ 5,719