| OTHER INTANGIBLES, NET |
13. OTHER INTANGIBLES, NET Intangible assets are amortized over their legal or estimated useful life. The following table provides a summary of the gross carrying value and accumulated amortization by each major intangible asset class as of September 30, 2026, and December 31, 2025: | | | | | | | | | | | | | | | | | | | | September 30, 2026 | | | December 31, 2025 | | | Estimated Useful Life (in years) | | | Gross
Carrying
Amount | | | Accumulated Amortization | | | Gross
Carrying
Amount | | | Accumulated Amortization | (in thousands) | | | | | | | | | | | | | | | Finite-lived intangibles: | | | | | | | | | | | | | | | Customer relationships (1) | | 10 | | $ | 34,189 | | $ | (6,878) | | $ | 93,700 | | $ | (8,778) | Trade names and trademarks (1) | | 10 | | | 6,867 | | | (1,861) | | | 12,819 | | | (1,816) | Software licenses | | 3 | | | 5,350 | | | (4,563) | | | 5,350 | | | (3,776) | Intangible assets currently being amortized | | | | | 46,406 | | | (13,302) | | | 111,869 | | | (14,370) | | | | | | | | | | | | | | | | Costs related to internal use software (2) | | | | | 27,907 | | | — | | | — | | | — | | | | | | | | | | | | | | | | Other intangibles | | | | $ | 74,313 | | $ | (13,302) | | $ | 111,869 | | $ | (14,370) |
| (1) | Current balances reflect the impact of the impairment charges recorded in the third quarter of 2026. See Note titled "Impairment charges" for additional information. In addition, the Company evaluated the remaining useful life of the intangibles that were subject to impairment and concluded that no changes were warranted as the Company continues to service Pintail customers and use the trade names in continuing operations of the Pintail asset group. |
| (2) | Amortization of these costs will begin when the asset is placed in service per the Company’s policy on internal-use software. As of December 31, 2025, $18.7 million of such costs were included in Property, plant and equipment and have not been reclassified. |
Amortization expense for each of the periods presented follows: | | | | | | | | | | | | | | | Three months ended | | Nine months ended | | | September 30, | | September 30, | | | | 2026 | | | 2025 | | | 2026 | | | 2025 | (in thousands) | | | | | | | | | | | | | Amortization of finite-lived intangible assets | | $ | 2,638 | | $ | 3,609 | | $ | 8,546 | | $ | 7,219 |
Estimated future amortization expense based on balances as of September 30, 2026, is as follows: approximately $1.2 million in the remainder of 2026, approximately $4.1 million in each of the years 2027 through 2031.
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