Liquidating Distributions - Schedule of Liquidating Distributions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Equity [Abstract]
Distributions during the year	$ 1,180,208	$ 44,554	$ 7,851,746
Less: Liquidating distributions payable at beginning of year	(16,555)	(31,720)
Add: Liquidating distributions payable at end of year	42,111	16,555	31,720
Total	$ 1,205,764	$ 29,389	$ 7,883,466