Condensed Statements of Cash Flows (Liquidation Basis) - Liquidation Basis of Accounting [Member] - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from (used in) operating activities
Cash receipts from dividends and interest	$ 4,124	$ 4,606
Cash paid for professional fees, governance costs and other administrative costs	(3,339)	(2,623)
Cash paid for Residual Wind-Down Claims	(1,052)	(510)
Cash paid for distributions	(6)	(84)
Net cash flows (used in) from operating activities	(273)	1,389
Cash flows from (used in) investing activities
Cash used to purchase marketable securities	(37,878)	(30,529)
Cash from maturities and sales of marketable securities	20,954	35,605
Net cash flows (used in) from investing activities	(16,924)	5,076
Cash flows from financing activities
Cash from sale of New GM Securities for distribution		66
Net cash flows from financing activities		66
Net (decrease) increase in cash and cash equivalents	(17,197)	6,531
Cash and cash equivalents, beginning of period	37,483	14,932
Cash and cash equivalents, end of period	$ 20,286	$ 21,463