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Schedule of Tax Rate Applicable to Pre-Tax Earning, U.S. Federal Statutory Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Computed “expected” tax expense	$ (225,265)	$ (48,845)	$ (23,193)
Foreign income taxed at different rates	232,904	90,779	(13,570)
FIN 48	3,007	(3,259)	(1,703)
Expenses which are not deductible for tax purposes	5,587	191	472
Non-deductible goodwill			15,811
Valuation allowance – deferred tax assets	(2,377)	(13,124)	17,829
Amortization of deferrals associated with intercompany sales to foreign tax jurisdictions	(3,860)	(4,319)	(2,358)
Expenses which are not deductible for book purposes			(832)
Foreign taxes	(928)	(744)	5,688
State taxes	11	(60)	(6)
Other, net	(2,682)	200	785
Income tax expense (benefit), Total	$ 6,397	$ 20,819	$ (1,077)

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