RESTRUCTURING, IMPAIRMENT AND OTHER CHARGES: Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	$ 2,962	$ 0	$ 3,701	$ 0
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	100		100
Facility Closing | Restructuring Activity 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			7,300
Restructuring reserve	2,500		2,500
United States | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			1,600
Restructuring reserve	$ 100		$ 100
United States and Europe | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments					$ 1,700