Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - Narrative (Details)

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INCOME TAXES - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Income Tax Examination        
Federal statutory rate (as a percent) 21.00%      
(Decrease) increase in valuation allowance $ 5,449 $ (2,545) $ 10,311  
Increase in balances related to tax positions in prior period 6,200      
Total unrecognized tax benefit including interest and penalties 102,200      
Unrecognized tax benefits that would impact effective tax rate 83,900      
Accrued interest and penalties 1,200      
Unrecognized tax benefits 101,119 $ 107,282 $ 116,032 $ 150,559
Increase in unrecognized tax benefits is reasonably possible 9,100      
Federal net operating loss 293,200      
Tax credit carryforwards 59,500      
Indefinite lived operating loss carry forward 12,800      
Acquired net operating losses included in carryforwards 11,100      
Acquired credits included in carryforwards 8,000      
Foreign currency related income tax benefit 600      
Other long-term assets        
Income Tax Examination        
Unrecognized tax benefits 95,500      
Other long-term liabilities        
Income Tax Examination        
Unrecognized tax benefits $ 6,700