RESTRUCTURING, IMPAIRMENT AND OTHER CHARGES: Summary of restructuring activity (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Restructuring Reserve [Roll Forward]
Restructuring charges and adjustments	$ 739	$ 0
Employee-related reserves
Restructuring Reserve [Roll Forward]
Restructuring Reserve, at the end of the period	100
Continuing operations
Restructuring Reserve [Roll Forward]
Restructuring Reserve, at the beginning of the period	3,074
Restructuring charges and adjustments	739
Payments	(1,021)
Restructuring Reserve, at the end of the period	2,792
Continuing operations | Employee-related reserves
Restructuring Reserve [Roll Forward]
Restructuring Reserve, at the beginning of the period	47
Restructuring charges and adjustments	739
Payments	(739)
Restructuring Reserve, at the end of the period	47
Continuing operations | Lease accruals
Restructuring Reserve [Roll Forward]
Restructuring Reserve, at the beginning of the period	3,027
Restructuring charges and adjustments	0
Payments	(282)
Restructuring Reserve, at the end of the period	$ 2,745