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SEGMENT INFORMATION - Reconciliation of Adjusted EBITDA to Net Income (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Reconciliation Of Adjusted EBITDA To Net Income [Abstract] |  |  |  |  |
Adjusted EBITDA |  |  | $ 225,809 | $ 210,408 | $ 227,750
Non-Operating Income and Expenses [Abstract] |  |  |  |  |
Acquisition and divestiture costs |  |  | (5,293) | (7,898) | (541)
Strategic initiatives and other charges |  |  | (13,923) | (28,060) | (28,998)
Non-recurring / incremental COVID-19 costs |  |  | 0 | (2,985) | (5,312)
Highly inflationary accounting losses (primarily non-cash) |  |  | (1,360) | (1,473) | 0
Defined benefit plan termination related items |  |  | 0 | 429 | 0
Asset write-downs, net |  |  | 0 | (10,050) | 0
Goodwill write-downs |  |  | 0 | (82,454) | 0
Stock-based compensation |  |  | (17,308) | (17,432) | (15,581)
Non-service pension and postretirement expense |  |  | (1,640) | (31,823) | (5,837)
Depreciation and amortization |  |  | (96,530) | (104,056) | (133,512)
Interest expense |  |  | (48,690) | (28,771) | (28,684)
Net loss attributable to noncontrolling interests |  |  | (155) | (54) | (52)
Income (loss) before income taxes |  |  | 40,910 | (104,219) | 9,233
Income tax (provision) benefit |  |  | (1,774) | 4,391 | (6,375)
Net income (loss) |  |  | 39,136 | (99,828) | 2,858
Gain on divestitures |  |  | 2,980 | 3,390 | 412
Loss recovery |  |  | 2,154 |  |
RPA financing fees |  |  | 4,042 | 1,046 |
Memorialization |  |  |  |  |
Non-Operating Income and Expenses [Abstract] |  |  |  |  |
Goodwill write-downs |  |  |  | 0 |
Industrial Technologies |  |  |  |  |
Non-Operating Income and Expenses [Abstract] |  |  |  |  |
Goodwill write-downs |  |  |  | 0 |
Gain on divestitures | $ 1,827 |  | 1,827 |  |
SGK Brand Solutions |  |  |  |  |
Non-Operating Income and Expenses [Abstract] |  |  |  |  |
Goodwill write-downs |  | $ 82,454 |  | (82,454) |
Operating Segments | Memorialization |  |  |  |  |
Reconciliation Of Adjusted EBITDA To Net Income [Abstract] |  |  |  |  |
Adjusted EBITDA |  |  | 163,986 | 151,849 | 165,653
Non-Operating Income and Expenses [Abstract] |  |  |  |  |
Non-recurring / incremental COVID-19 costs |  |  |  | (1,314) | (3,646)
Depreciation and amortization |  |  | (23,738) | (23,228) | (23,043)
Acquisition costs, ERP integration costs, and strategic initiatives and other charges |  |  | 1,002 | 3,517 | 1,923
Operating Segments | Industrial Technologies |  |  |  |  |
Reconciliation Of Adjusted EBITDA To Net Income [Abstract] |  |  |  |  |
Adjusted EBITDA |  |  | 66,278 | 56,762 | 34,889
Non-Operating Income and Expenses [Abstract] |  |  |  |  |
Non-recurring / incremental COVID-19 costs |  |  |  | (6) | (38)
Depreciation and amortization |  |  | (23,184) | (11,387) | (11,427)
Acquisition costs, ERP integration costs, and strategic initiatives and other charges |  |  | 4,108 | 5,631 | 4,026
Operating Segments | SGK Brand Solutions |  |  |  |  |
Reconciliation Of Adjusted EBITDA To Net Income [Abstract] |  |  |  |  |
Adjusted EBITDA |  |  | 57,128 | 60,120 | 91,435
Non-Operating Income and Expenses [Abstract] |  |  |  |  |
Non-recurring / incremental COVID-19 costs |  |  |  | (1,199) | (1,539)
Depreciation and amortization |  |  | (44,842) | (64,173) | (93,665)
Acquisition costs, ERP integration costs, and strategic initiatives and other charges |  |  | 10,905 | 19,359 | 12,323
Corporate, Non-Segment |  |  |  |  |
Reconciliation Of Adjusted EBITDA To Net Income [Abstract] |  |  |  |  |
Adjusted EBITDA |  |  | (61,583) | (58,323) | (64,227)
Non-Operating Income and Expenses [Abstract] |  |  |  |  |
Non-recurring / incremental COVID-19 costs |  |  |  | (466) | (89)
Depreciation and amortization |  |  | (4,766) | (5,268) | (5,377)
Acquisition costs, ERP integration costs, and strategic initiatives and other charges |  |  | $ 3,201 | $ 7,451 | $ 11,267

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