INCOME TAX: Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Tax Examination [Line Items]
Deferred tax assets, valuation allowance	$ 37,399	$ 35,332
Gross unrecognized tax benefits	23,817	25,026	$ 23,400	$ 19,600
Gross unrecognized tax benefits that would impact effective tax rate	20,100
Accrued interest and penalties related to tax positions on tax returns	4,300
Increase in accrued interest and penalties related to tax positions on tax returns	800
Internal Revenue Service (IRS)
Income Tax Examination [Line Items]
Operating loss carryforwards	900
Federal tax authority
Income Tax Examination [Line Items]
Credit carryforwards that will not expire	16,800
Tax credit carryforward, amount	3,000
State and Local Jurisdiction
Income Tax Examination [Line Items]
Operating loss carryforwards	125,500
Tax credit carryforward, amount	7,000
Foreign Tax Authority
Income Tax Examination [Line Items]
Foreign net operating loss carryforwards	99,600
Deferred tax assets, valuation allowance	22,700
Tax Year 2021
Income Tax Examination [Line Items]
Income tax examination, refund adjustment from settlement with taxing authority			$ 28,000
Tax Year 2020
Income Tax Examination [Line Items]
Income tax examination, refund adjustment from settlement with taxing authority		$ 32,000
Indefinite Tax Year
Income Tax Examination [Line Items]
Foreign net operating loss carryforwards	90,400
Indefinite Tax Year | State and Local Jurisdiction
Income Tax Examination [Line Items]
Tax credit carryforward, amount	$ 6,300