Liquidating Distributions - Schedule of Liquidating Distributions (Detail) - Liquidation Basis of Accounting [Member] - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Distributions during the year	$ 112,382	$ 130,248	$ 244,326
Less: Liquidating distributions payable at beginning of year	(6,213)	(7,714)	(42,111)
Add: Liquidating distributions payable at end of year	9,205	6,213	7,714
Total	$ 115,374	$ 128,747	$ 209,929