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Leases - Schedule of Right-of-use Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Disclosure Of Operating Lease [Abstract]      
Opening balance $ 14,038 $ 23,330  
Additions to right-of-use assets 1,891 1,275  
Derecognition of right-of-use assets (876) (6,625)  
Depreciation charged during the year (3,064) (4,333) $ (5,284)
Effect of movements in foreign exchange rates (371) 391  
Closing Balance $ 11,618 $ 14,038 $ 23,330