Annual report [Section 13 and 15(d), not S-K Item 405]

INCOME TAXES - Narrative (Details)

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INCOME TAXES - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Income Tax Contingency [Line Items]      
Increase (decrease) in valuation allowance $ 6,900 $ 14,100  
Decrease in unrecognized tax benefits 5,100    
Unrecognized tax benefits 76,589 $ 81,678 $ 88,341
Unrecognized tax benefits that would impact effective tax rate 68,800    
Total unrecognized tax benefit including interest and penalties 1,200    
Unrecognized tax benefits including interest and penalties 77,800    
Increase in unrecognized tax benefits is reasonably possible 2,600    
Increase in unrecognized tax benefits valuation allowance is reasonably possible 1,700    
Increase in unrecognized tax benefits net is reasonably possible 900    
Federal net operating loss 324,800    
Tax credit carryforwards 26,700    
Indefinite lived operating loss carry forward 151,500    
Acquired net operating losses included in carryforwards 5,300    
Other long-term assets      
Income Tax Contingency [Line Items]      
Unrecognized tax benefits 70,900    
Other long-term liabilities      
Income Tax Contingency [Line Items]      
Unrecognized tax benefits $ 6,900