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Schedule of Income Tax Expense (Benefit) (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Reconciliation of Provision of Income Taxes [Line Items]      
Current, Federal, Income tax expense (benefit) $ (602) $ (7,633) $ (5,009)
Deferred, Federal, Income tax expense (benefit) (34,226) (11,335) (24,545)
Federal, Income tax expense (benefit) (34,828) (18,968) (29,554)
Current, State, Income tax expense (benefit) 4 (313) (558)
Deferred, State, Income tax expense (benefit)         
State, Income tax expense (benefit) 4 (313) (558)
Current, International, Income tax expense (benefit) 68,100 64,092 54,363
Deferred, International, Income tax expense (benefit) (483) (398) (626)
International, Income tax expense (benefit) 67,617 63,694 53,737
Current, Total, Income tax expense (benefit) 67,502 56,146 48,796
Deferred, Total, Income tax expense (benefit) (34,709) (11,733) (25,171)
Income tax expense (benefit), Total $ 32,793 $ 44,413 $ 23,625