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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024 | Sep. 30, 2024
Goodwill [Line Items] |  |  |  |  |
Accumulated impairment charges | $ 45,673 |  | $ 45,673 |  | $ 277,913
Amortization expense on intangible assets | 4,280 | $ 8,959 | 12,888 | $ 18,754 |
Future amortization expense [Abstract] |  |  |  |  |
Future amortization expense for the remainder 2025 | 14,049 |  | 14,049 |  |
Future amortization expense 2026 | 10,453 |  | 10,453 |  |
Future amortization expense 2027 | 9,509 |  | 9,509 |  |
Future amortization expense 2028 | 7,505 |  | 7,505 |  |
Future amortization expense 2029 | 6,531 |  | 6,531 |  |
Memorialization |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Accumulated impairment charges | 5,000 |  | 5,000 |  | 5,000
Industrial Technologies |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Accumulated impairment charges | 40,673 |  | 40,673 |  | 40,673
SGK Brand Solutions |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Accumulated impairment charges | $ 232,240 |  | $ 232,240 |  | $ 232,240

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-2 + Details
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