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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 |  |  |  |

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