v3.26.1
Schedule II - Valuation and Qualifying Accounts (Detail) - Deferred Tax Asset Valuation Allowance [Member] - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning Balance $ 430,501 $ 353,642 $ 150,047
Charged to costs and expenses 4,482 76,859 139,687
Charged to goodwill [1]     63,908
Ending Balance $ 434,983 $ 430,501 $ 353,642
[1] Related to the acquisition of Inmarsat