v3.25.2
Tax Assets and Liabilities - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure Of Components Of Deferred Tax Assets And Liabilities [Line Items]      
Temporary difference related to investment in subsidiaries on which no deferred tax assets was recognized $ 2,909 $ 4,956  
Tax Expense Benefit Arising From Previously Unrecognised Tax Loss Tax Credit   (533) $ (12,860)
Recognition of previously unrecognized tax losses 10,224 118,253  
Recognition of previously unrecognized tax losses     $ 601,200
Deductible temporary differences, tax impact   151,310  
Expiry of recognised deferred tax assets on carry forward losses including unabsorbed depreciation $ 9,829    
Bottom of Range [Member]      
Disclosure Of Components Of Deferred Tax Assets And Liabilities [Line Items]      
Tax loss expiration period 2026    
Top of Range [Member]      
Disclosure Of Components Of Deferred Tax Assets And Liabilities [Line Items]      
Tax loss expiration period 2043    
Indian Subsidiaries [Member]      
Disclosure Of Components Of Deferred Tax Assets And Liabilities [Line Items]      
Unabsorbed tax losses and depreciation carried forward for an indefinite period $ 4,233 $ 4,299