Schedule of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Current, Federal, Income tax expense (benefit)	$ (13,335)	$ 4,869	$ (602)
Deferred, Federal, Income tax expense (benefit)	(6,796)	(72,389)	(34,226)
Federal, Income tax expense (benefit)	(20,131)	(67,520)	(34,828)
Current, State, Income tax expense (benefit)	(92)	(9)	4
Deferred, State, Income tax expense (benefit)	0	0	0
State, Income tax expense (benefit)	(92)	(9)	4
Current, International, Income tax expense (benefit)	41,042	66,452	68,100
Deferred, International, Income tax expense (benefit)			(483)
International, Income tax expense (benefit)	41,042	66,452	67,617
Current, Total, Income tax expense (benefit)	27,615	71,312	67,502
Deferred, Total, Income tax expense (benefit)	(6,796)	(72,389)	(34,709)
Income tax expense (benefit), Total	$ 20,819	$ (1,077)	$ 32,793