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GOODWILL AND OTHER INTANGIBLES | 6 Months Ended
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Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND OTHER INTANGIBLES | GOODWILL AND OTHER INTANGIBLES Indicators of impairment were not present for any of Griffon's reporting units during the six months ended March 31, 2025. The following table provides a summary of the carrying value of goodwill by segment as of March 31, 2025 and September 30, 2024, as follows:
| At September 30, 2024 |  |  |  |  |  | Goodwill from acquisitions (1) |  | Foreign currency translation adjustments |  | At March 31, 2025 |  |
Home and Building Products | $ | 191,253 |  |  |  |  |  |  | $ | — |  |  | $ | — |  |  | $ | 191,253 |  |  |
Consumer and Professional Products | 138,140 |  |  |  |  |  |  | 230 |  |  | (94) |  |  | 138,276 |  |  |
Total | $ | 329,393 |  |  |  |  |  |  | $ | 230 |  |  | $ | (94) |  |  | $ | 329,529 |  |  |
(1) The increase is due to preliminary purchase price allocation adjustments recorded during the three and six months ended March 31, 2025 related to the 2024 Pope acquisition. The following table provides the gross carrying value and accumulated amortization for each major class of intangible assets:
| At March 31, 2025 |  |  |  | At September 30, 2024
| Gross Carrying Amount |  | Accumulated Amortization |  | Average Life (Years) |  | Gross Carrying Amount |  | Accumulated Amortization
Customer relationships & other | $ | 447,401 |  |  | $ | 140,537 |  |  | 17 |  | $ | 450,784 |  |  | $ | 134,296 |
Technology and patents | 17,758 |  |  | 10,446 |  |  | 10 |  | 17,350 |  |  | 6,859 |
Total amortizable intangible assets | 465,159 |  |  | 150,983 |  |  |  |  | 468,134 |  |  | 141,155 |
Trademarks | 290,264 |  |  | — |  |  |  |  | 291,803 |  |  | — |
Total intangible assets | $ | 755,423 |  |  | $ | 150,983 |  |  |  |  | $ | 759,937 |  |  | $ | 141,155 |
The gross carrying amount of intangible assets was impacted by $4,514 related to unfavorable foreign currency translation. Amortization expense for intangible assets was $5,792 and $5,581 for the quarters ended March 31, 2025 and 2024, respectively, and $11,556 and $11,137 for the six months ended March 31, 2025 and 2024, respectively. Amortization expense for the remainder of 2025 and the next five fiscal years and thereafter, based on current intangible balances and classifications, is estimated as follows: remaining in 2025 - $11,152; 2026 - $22,708; 2027 - $22,107; 2028 - $22,107; 2029 - $22,107; 2030 - $22,107; thereafter $191,888.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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