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Income Tax (Provision) Benefit - Components of Income Tax (Provision) Benefit (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Current	$ 0us-gaap_CurrentIncomeTaxExpenseBenefit	$ 0us-gaap_CurrentIncomeTaxExpenseBenefit	$ 0us-gaap_CurrentIncomeTaxExpenseBenefit	$ 0us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred		(32,183)us-gaap_DeferredIncomeTaxExpenseBenefit		132,662us-gaap_DeferredIncomeTaxExpenseBenefit
Total		$ (32,183)us-gaap_IncomeTaxExpenseBenefit		$ 132,662us-gaap_IncomeTaxExpenseBenefit

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.