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INCOME TAXES: - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2022
Apr. 01, 2021
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Income Tax Examination [Line Items]            
Deferred tax assets, valuation allowance $ 35,332     $ 32,971    
Gross unrecognized tax benefits 25,026     $ 23,400 $ 19,600 $ 15,415
Gross unrecognized tax benefits that would impact effective tax rate 22,600          
Accrued interest and penalties related to tax positions on tax returns 3,500          
Increase in accrued interest and penalties related to tax positions on tax returns 1,000          
Internal Revenue Service (IRS)            
Income Tax Examination [Line Items]            
Operating loss carryforwards 34,300          
Federal tax authority            
Income Tax Examination [Line Items]            
Credit carryforwards that will not expire 24,000          
Tax credit carryforward, amount 5,400          
State and Local Jurisdiction            
Income Tax Examination [Line Items]            
Operating loss carryforwards 126,200          
Credit carryforwards that will not expire 18,900          
Tax credit carryforward, amount 5,800          
Foreign Tax Authority            
Income Tax Examination [Line Items]            
Foreign net operating loss carryforwards 101,000          
Deferred tax assets, valuation allowance 26,000          
Indefinite Tax Year            
Income Tax Examination [Line Items]            
Foreign net operating loss carryforwards 90,200          
Indefinite Tax Year | State and Local Jurisdiction            
Income Tax Examination [Line Items]            
Tax credit carryforward, amount $ 5,200          
Tax Year 2021 | Scenario, Forecast            
Income Tax Examination [Line Items]            
Income tax examination, refund adjustment from settlement with taxing authority   $ 28,000 $ 28,000      
Tax Year 2020 | Scenario, Forecast            
Income Tax Examination [Line Items]            
Income tax examination, refund adjustment from settlement with taxing authority   $ 33,000