Cash and cash equivalents (Details Textual) ₨ in Thousands, $ in Thousands	Mar. 31, 2018 INR (₨)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 INR (₨)	Mar. 31, 2016 INR (₨)
Disclosure Of Cash And Cash Equivalents [Abstract]
Restricted cash and cash equivalents	₨ 296,275	$ 4,555	₨ 262,907	₨ 345,328
Cash and cash equivalents	₨ 1,991,846	$ 30,625	₨ 1,621,358	₨ 1,390,552

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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