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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Sep. 30, 2019
Goodwill [Line Items] |  |  |  |  |  |
Accumulated impairment charges | $ 178,732 |  |  | $ 178,732 |  | $ 88,324
Goodwill write-down | 0 |  | $ 0 | 90,408 | $ 0 |
Amortization expense on intangible assets | 17,825 |  | $ 9,543 | 53,639 | $ 27,165 |
Future amortization expense [Abstract] |  |  |  |  |  |
Future amortization expense for the remainder 2020 | 17,844 |  |  | 17,844 |  |
Future amortization expense 2021 | 60,156 |  |  | 60,156 |  |
Future amortization expense 2022 | 46,766 |  |  | 46,766 |  |
Future amortization expense 2023 | 27,833 |  |  | 27,833 |  |
Future amortization expense 2024 | 26,214 |  |  | 26,214 |  |
SGK Brand Solutions |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Accumulated impairment charges | 173,732 |  |  | 173,732 |  | 83,324
Goodwill write-down |  | $ 90,408 |  |  |  |
Memorialization |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Accumulated impairment charges | $ 5,000 |  |  | 5,000 |  | $ 5,000
Goodwill write-down |  |  |  | $ 0 |  |

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