ALLOWANCE FOR CREDIT LOSSES: Summary of the activity of the allowance for doubtful accounts, returns and credits (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 7,617
Additions charged to costs and expenses	3,127	$ 3,346
Other changes	0
Bad debts written off, net of amounts recovered	(1,121)
Balance at end of period	$ 9,623