Liquidating Distributions - Schedule of Liquidating Distributions (Detail) (Liquidation Basis of Accounting [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Liquidation Basis of Accounting [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Distributions during the period	$ 137		$ 3,548
Less: Liquidating distributions payable at beginning of period	(48,978)		(42,111)
Add: Liquidating distributions payable at end of period	248,763		248,763
Total	$ 199,922	$ 81,885	$ 210,200	$ 100,808