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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 USD ($) | Mar. 31, 2020 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) reporting_unit | Mar. 31, 2022
Goodwill [Line Items] |  |  |  |  |  |
Accumulated goodwill impairment loss | $ 261,186 |  | $ 261,186 | $ 178,732 |  |
Goodwill write-down |  | $ 90,408 | 82,454 | 0 | $ 90,408 |
Number of reporting units | reporting_unit |  |  |  |  | 2 |
Amortization expense on intangible assets |  |  | 57,084 | 84,233 | $ 71,514 |
Future amortization expense [Abstract] |  |  |  |  |  |
Future amortization expense 2023 | 41,427 |  | 41,427 |  |  |
Future amortization expense 2024 | 35,889 |  | 35,889 |  |  |
Future amortization expense 2025 | 18,601 |  | 18,601 |  |  |
Future amortization expense 2026 | 14,357 |  | 14,357 |  |  |
Future amortization expense 2027 | 13,364 |  | 13,364 |  |  |
SGK Brand Solutions |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Percent of fair value exceeding carrying value |  |  |  |  |  | 10.00%
Memorialization |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Accumulated goodwill impairment loss | 5,000 |  | 5,000 | 5,000 |  |
Goodwill write-down |  |  | 0 |  |  |
Industrial Technologies |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Accumulated goodwill impairment loss | 23,946 |  | 23,946 | 23,946 |  |
Goodwill write-down |  |  | 0 |  |  |
SGK Brand Solutions |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Accumulated goodwill impairment loss | 232,240 |  | 232,240 | $ 149,786 |  |
Goodwill write-down | $ 82,454 |  | $ 82,454 |  |  |
Number of reporting units | reporting_unit |  |  |  |  | 2 |

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