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Goodwill and Other Intangibles | 3 Months Ended
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Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangibles | Goodwill and Other Intangibles: The following table summarizes the changes in goodwill by reportable segment for the three-month period ended March 31, 2025 (in thousands):
| Energy Storage |  | Specialties |  | Ketjen |  |  |  | Total
Balance at December 31, 2024(a) | $ | 1,387,591 |  |  | $ | 32,577 |  |  | $ | 162,546 |  |  |  |  | $ | 1,582,714 |
Foreign currency translation adjustments | 18,372 |  |  | 10 |  |  | 5,048 |  |  |  |  | 23,430 |
Balance at March 31, 2025(a) | $ | 1,405,963 |  |  | $ | 32,587 |  |  | $ | 167,594 |  |  |  |  | $ | 1,606,144 |
(a) Balance at March 31, 2025 and December 31, 2024 includes an accumulated impairment loss of $6.8 million from the (“PCS”) reporting unit within the Ketjen segment. As a result, the balance of Ketjen at March 31, 2025 and December 31, 2024 fully consists of goodwill related to the Refining Solutions reporting unit. As previously discussed in Part II, Item 8 - Note 1, "Summary of Significant Accounting Policies," of the Company's Annual Report on Form 10-K for the year ended December 31, 2024, if revenue or adjusted EBITDA growth are lower than forecasted, or costs are higher than anticipated, the Company may recognize a non-cash goodwill impairment loss in the Refining Solutions reporting unit within the Ketjen segment. The following table summarizes the changes in other intangibles and related accumulated amortization for the three-month period ended March 31, 2025 (in thousands):
| Customer Lists and Relationships |  | Trade Names and Trademarks(a) |  | Patents and Technology |  | Other |  | Total
Gross Asset Value |  |  |  |  |  |  |  |  |
Balance at December 31, 2024 | $ | 402,012 |  |  | $ | 10,670 |  |  | $ | 32,265 |  |  | $ | 29,010 |  |  | $ | 473,957 |
Foreign currency translation adjustments and other | 7,197 |  |  | 214 |  |  | 147 |  |  | 937 |  |  | 8,495 |
Balance at March 31, 2025 | $ | 409,209 |  |  | $ | 10,884 |  |  | $ | 32,412 |  |  | $ | 29,947 |  |  | $ | 482,452 |
Accumulated Amortization |  |  |  |  |  |  |  |  |
Balance at December 31, 2024 | $ | (216,231) |  |  | $ | (1,324) |  |  | $ | (14,253) |  |  | $ | (11,396) |  |  | $ | (243,204) |
Amortization | (4,615) |  |  | — |  |  | (629) |  |  | (223) |  |  | (5,467) |
Foreign currency translation adjustments and other | (3,761) |  |  | — |  |  | (89) |  |  | (192) |  |  | (4,042) |
Balance at March 31, 2025 | $ | (224,607) |  |  | $ | (1,324) |  |  | $ | (14,971) |  |  | $ | (11,811) |  |  | $ | (252,713) |
Net Book Value at December 31, 2024 | $ | 185,781 |  |  | $ | 9,346 |  |  | $ | 18,012 |  |  | $ | 17,614 |  |  | $ | 230,753 |
Net Book Value at March 31, 2025 | $ | 184,602 |  |  | $ | 9,560 |  |  | $ | 17,441 |  |  | $ | 18,136 |  |  | $ | 229,739 |
(a) Net Book Value includes only indefinite-lived intangible assets.

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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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