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Other Income, Net - Summary of Other Income, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Analysis of income and expense [abstract]
Interest income	$ 3,693	$ 2,083	$ 1,197
Dividend income	3,570	4,131	5,039
Net gain arising on financial assets designated as FVTPL	3	6	41
Others, net	3,964	2,469	2,217
Total	$ 11,230	$ 8,689	$ 8,494

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The gains (losses) on financial assets at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss]

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The amount of finance income that the entity does not separately disclose in the same statement or note. [Refer: Finance income]

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The amount of dividends recognised as income. Dividends are distributions of profits to holders of equity investments in proportion to their holdings of a particular class of capital.

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