Fair Value Measurements (Tables)

6 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table presents information about the GUC Trust’s assets and liabilities measured at fair value on a recurring basis at September 30, 2014 and March 31, 2014, and the valuation techniques used by the GUC Trust to determine those fair values.

	September 30, 2014
(in thousands)	Level 1		Level 2		Level 3		Total
Assets:
Cash Equivalents:
Money market funds	$	13,073	$	—	$	—	$	13,073
Marketable Securities:
Municipal commercial paper and demand notes		—		12,886		—		12,886
Corporate commercial paper		—		22,277		—		22,277
Holdings of New GM Securities:
New GM Common Stock		486,998		—		—		486,998
New GM Warrants		510,642		—		—		510,642
Total Assets	$	1,010,713	$	35,163	$	—	$	1,045,876
Liabilities:
Liquidating distributions payable	$	248,763	$	—	$	—	$	248,763

	March 31, 2014
(in thousands)	Level 1		Level 2		Level 3		Total
Assets:
Cash Equivalents:
Money market funds	$	8,953	$	—	$	—	$	8,953
Marketable Securities:
Municipal commercial paper and demand notes		—		18,005		—		18,005
Corporate commercial paper		—		26,377		—		26,377
Holdings of New GM Securities:
New GM Common Stock		526,533		—		—		526,533
New GM Warrants		587,545		—		—		587,545
Total Assets	$	1,123,031	$	44,382	$	—	$	1,167,413
Liabilities:
Liquidating distributions payable	$	42,111	$	—	$	—	$	42,111