Liquidating Distributions - Schedule of Liquidating Distributions (Detail) - Liquidation Basis of Accounting [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Distributions during the period	$ 430		$ 430
Less: Liquidating distributions payable at beginning of period	(10,011)		(9,205)
Add: Liquidating distributions payable at end of period	8,790		8,790
Total	$ (791)	$ 107,058	$ 15	$ 107,971