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Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Apr. 01, 2018
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Cash and cash equivalents [abstract]          
Cash and bank balances $ 43,933   $ 47,738    
Short term deposits with banks 41,511   52,091    
Total $ 85,444 $ 99,829 $ 99,829 $ 69,803 $ 41,854