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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

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