Segment reporting (Details 1) ₨ in Thousands, $ in Thousands	12 Months Ended
Mar. 31, 2018 INR (₨)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 INR (₨)	Mar. 31, 2016 INR (₨)
Revenue
Revenue	₨ 20,685,613	$ 318,044	₨ 18,432,020	₨ 15,034,896
Country of domicile [member]
Revenue
Revenue	16,649,473		13,441,211	9,860,427
Foreign countries [member]
Revenue
Revenue	₨ 4,036,140		₨ 4,990,809	₨ 5,174,469

The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants.

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+ Details