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SEGMENT INFORMATION - Reconciliation of Adjusted EBITDA to Net Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Reconciliation Of Adjusted EBITDA To Net Income [Abstract] |  |  |  |
Adjusted EBITDA |  | $ 220,872 | $ 255,114 | $ 238,683
Non-Operating Income and Expenses [Abstract] |  |  |  |
Acquisition costs |  | (10,872) | (10,918) | (17,722)
ERP integration costs |  | (7,508) | (10,864) | (8,026)
Strategic initiatives and other charges |  | (13,449) | (5,266) | (9,209)
Loss recoveries, net of costs |  | 0 | 0 | 10,683
Joint Venture depreciation, amortization and interest expense |  | (1,514) | 0 | 0
Goodwill write-down | $ (77,572) | (77,572) | 0 | 0
Loss on divestitures |  | (6,469) | 0 | 0
Realized (loss) gain on cost-method investments |  | (4,731) | 3,771 | 0
Net gains from the sale of buildings and vacant properties |  | 7,347 | 0 | 0
Stock-based compensation |  | (7,729) | (13,460) | (14,562)
Non-service pension and postretirement expense |  | (3,802) | (5,723) | (8,773)
Depreciation and amortization |  | (90,793) | (76,974) | (67,981)
Interest expense |  | (40,962) | (37,427) | (26,371)
Net loss attributable to noncontrolling interests |  | (901) | (260) | (435)
(Loss) income before income taxes |  | (38,083) | 97,993 | 96,287
Income tax (provision) benefit |  | (806) | 9,118 | (22,354)
Net (loss) income |  | (38,889) | 107,111 | 73,933
SGK Brand Solutions |  |  |  |
Non-Operating Income and Expenses [Abstract] |  |  |  |
Goodwill write-down |  | (77,572) |  |
Acquisition costs, ERP integration costs, and strategic initiatives and other charges |  | 8,903 | 11,044 | 14,453
Memorialization |  |  |  |
Non-Operating Income and Expenses [Abstract] |  |  |  |
Goodwill write-down |  | 0 |  |
Acquisition costs, ERP integration costs, and strategic initiatives and other charges |  |  | 1,430 | 842
Industrial Technologies |  |  |  |
Non-Operating Income and Expenses [Abstract] |  |  |  |
Goodwill write-down |  | 0 |  |
Acquisition costs, ERP integration costs, and strategic initiatives and other charges |  | 3,073 | 613 | 612
Operating Segments | SGK Brand Solutions |  |  |  |
Reconciliation Of Adjusted EBITDA To Net Income [Abstract] |  |  |  |
Adjusted EBITDA |  | 119,493 | 150,233 | 144,783
Non-Operating Income and Expenses [Abstract] |  |  |  |
Net gains from the sale of buildings and vacant properties |  | (915) |  |
Depreciation and amortization |  | (59,684) | (46,300) | (41,941)
Operating Segments | Memorialization |  |  |  |
Reconciliation Of Adjusted EBITDA To Net Income [Abstract] |  |  |  |
Adjusted EBITDA |  | 134,286 | 145,487 | 139,192
Non-Operating Income and Expenses [Abstract] |  |  |  |
Net gains from the sale of buildings and vacant properties |  | (401) |  |
Depreciation and amortization |  | (19,731) | (20,005) | (19,808)
Operating Segments | Industrial Technologies |  |  |  |
Reconciliation Of Adjusted EBITDA To Net Income [Abstract] |  |  |  |
Adjusted EBITDA |  | 24,082 | 25,864 | 18,481
Non-Operating Income and Expenses [Abstract] |  |  |  |
Net gains from the sale of buildings and vacant properties |  | 8,663 |  |
Depreciation and amortization |  | (6,195) | (5,796) | (2,863)
Corporate, Non-Segment |  |  |  |
Reconciliation Of Adjusted EBITDA To Net Income [Abstract] |  |  |  |
Adjusted EBITDA |  | (56,989) | (66,470) | (63,773)
Non-Operating Income and Expenses [Abstract] |  |  |  |
Depreciation and amortization |  | (5,183) | (4,873) | (3,369)
Acquisition costs, ERP integration costs, and strategic initiatives and other charges |  | $ 19,853 | $ 13,961 | $ 19,050

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