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Significant accounting policies - Group as lessee (Details) - INR (₨)
₨ in Thousands
Mar. 31, 2020
Apr. 01, 2019
Mar. 31, 2019
Significant accounting policies      
Operating lease commitments   ₨ 759,046 ₨ 759,046
Weighted average incremental borrowing rate   14.40%  
Discounted operating lease commitments   ₨ 226,839  
Less: Commitments relating to short-term leases   (20,515)  
Add: Commitments relating to leases previously classified as finance leases   3,806  
Lease liabilities ₨ 539,628 ₨ 210,130