Segment reporting (Details 1) ₨ in Thousands, $ in Thousands	12 Months Ended
Mar. 31, 2021 INR (₨)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 INR (₨)	Mar. 31, 2019 INR (₨)
Revenue
Revenue	₨ 24,319,542	$ 330,857	₨ 22,952,067	₨ 21,546,885
Country of domicile [member]
Revenue
Revenue	20,292,816		17,808,889	16,879,558
Foreign countries [member]
Revenue
Revenue	₨ 4,026,726		₨ 5,143,178	₨ 4,667,327

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details