Condensed Statements of Changes in Net Assets in Liquidation (Liquidation Basis) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Condensed Statements of Changes in Net Assets in Liquidation (Liquidation Basis) [Abstract]
Net Assets in Liquidation, beginning of period	$ 1,390,181	$ 1,369,239
Increase (decrease) in net assets in liquidation:
Net reduction in (additions to) reserves for Expected Costs of Liquidation	1,678	(720)
Liquidating distributions (Note 4)	(18,923)	(19,842)
Net change in fair value of holdings of New GM Securities	417,924	(449,947)
Interest and dividend income	27	53
Income tax (provision) benefit	(166,170)	108,583
Net increase (decrease) in net assets in liquidation	234,536	(361,873)
Net Assets in Liquidation, end of period	$ 1,624,717	$ 1,007,366