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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Tax Credit Carryforward [Line Items]          
Valuation allowance   $ 1,200 $ 1,175    
Transferable federal tax credits, amount purchased   17,400      
Transferable federal tax credits, amount paid   16,100      
Transferable federal tax credits   1,305 1,920 $ 0  
Transferable tax credits, committed amount   3,200      
Net operating loss carryforwards, state   4,200      
Unrecognized tax benefits   11,989 $ 9,302 $ 7,913 $ 6,188
Unrecognized tax benefits that would impact the effective tax rate   11,800      
Forecast          
Tax Credit Carryforward [Line Items]          
Transferable tax credits, committed amount $ 12,300        
State and Local Jurisdiction          
Tax Credit Carryforward [Line Items]          
Tax credit carryforwards, research   $ 10,000