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Schedule of Income Tax Expense (Benefit) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Income Tax Disclosure [Abstract]      
Current, Federal, Income tax expense (benefit) $ (842) $ (13,335) $ 4,869
Deferred, Federal, Income tax expense (benefit) (2,200) (6,796) (72,389)
Federal, Income tax expense (benefit) (3,042) (20,131) (67,520)
Current, State, Income tax expense (benefit) 17 (92) (9)
Deferred, State, Income tax expense (benefit) 0 0 0
State, Income tax expense (benefit) 17 (92) (9)
Current, International, Income tax expense (benefit) 9,422 41,042 66,452
International, Income tax expense (benefit) 9,422 41,042 66,452
Current, Total, Income tax expense (benefit) 8,597 27,615 71,312
Deferred, Total, Income tax expense (benefit) (2,200) (6,796) (72,389)
Income tax expense (benefit), Total $ 6,397 $ 20,819 $ (1,077)