ALLOWANCE FOR CREDIT LOSSES: Summary of the activity of the allowance for doubtful accounts, returns and credits (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 9,961
Additions charged to costs and expenses	997	$ 955
Other changes	(11)
Bad debts written off, net of amounts recovered	(514)
Balance at end of period	$ 10,433