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Income Tax Benefit (Provision) - Components of Income Tax (Benefit) Provision (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Income Tax Disclosure [Abstract]
Current
Deferred	164,845	(56,262)	(108,583)
Total	$ 164,845	$ (56,262)	$ (108,583)

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.