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REVENUE RECOGNITION - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |
Sales | $ 1,497,689 | $ 1,795,737 | $ 1,880,896
North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 1,070,084 | 1,182,523 | 1,219,238
Central and South America (1) |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 3,089 | 5,456 | 5,260
Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 357,077 | 522,196 | 572,736
Australia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 17,451 | 19,514 | 19,913
Asia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 49,988 | 66,048 | 63,749
Memorialization |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 809,514 | 829,731 | 842,997
Memorialization | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 774,246 | 788,918 | 799,153
Memorialization | Central and South America (1) |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 0 | 0 | 0
Memorialization | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 23,135 | 30,446 | 32,745
Memorialization | Australia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 12,133 | 10,367 | 11,099
Memorialization | Asia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 0 | 0 | 0
Industrial Technologies |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 342,229 | 433,156 | 505,751
Industrial Technologies | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 136,662 | 141,395 | 164,334
Industrial Technologies | Central and South America (1) |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 0 | 0 | 0
Industrial Technologies | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 199,254 | 284,987 | 333,759
Industrial Technologies | Australia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 0 | 0 | 0
Industrial Technologies | Asia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 6,313 | 6,774 | 7,658
Brand Solutions |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 345,946 | 532,850 | 532,148
Brand Solutions | North America |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 159,176 | 252,210 | 255,751
Brand Solutions | Central and South America (1) |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 3,089 | 5,456 | 5,260
Brand Solutions | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 134,688 | 206,763 | 206,232
Brand Solutions | Australia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | 5,318 | 9,147 | 8,814
Brand Solutions | Asia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Sales | $ 43,675 | $ 59,274 | $ 56,091

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