Income Taxes - Additional Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Income Tax Examination [Line Items] | |||||||||||
| Discrete tax benefit | $ 1,400 | ||||||||||
| Effective income tax rate | (247.20%) | 200.60% | 28.40% | 250.90% | 26.20% | (4.70%) | 13.60% | ||||
| U.S. federal statutory rate | 21.00% | 21.00% | 21.00% | 21.00% | 21.00% | ||||||
| Disallowed interest | $ 116,559 | $ 97,593 | |||||||||
| Ownership changes on common stock description | The events that may cause ownership changes include, but are not limited to, a cumulative stock ownership change of greater than 50% over a three year period. | ||||||||||
| Valuation allowance | $ 36,051 | 27,388 | |||||||||
| Net increase in valuation allowance | 8,663 | ||||||||||
| Unrecognized tax benefits | $ 1,327 | [1] | 1,734 | [1] | $ 0 | ||||||
| Tax examination, Description | The major jurisdictions where the Company is subject to potential examination include the U.S. and the U.S. state jurisdictions. U.S. and major state returns are generally open for examination for the 2021 tax year and onward. However, to the extent allowed by law, the tax authorities may have the right to examine prior periods where net operating losses or tax credits were generated and carried forward, and make adjustments up to the amount of the net operating loss or credit carryforward. Accordingly, tax years 2016 through 2020 for Arcline Engineered Polymer Topco, L.P. remain open for examination with respect to NOL carryforwards used in the 2022 tax return. | ||||||||||
| Tax years under examination | 2016 2017 2018 2019 2020 | ||||||||||
| Interest and penalties recognized | $ (73) | 115 | $ 0 | ||||||||
| Foreign [Member] | |||||||||||
| Income Tax Examination [Line Items] | |||||||||||
| Tax loss carry forwards | 489 | 2,121 | |||||||||
| Valuation allowance | 268 | 145 | |||||||||
| Federal and State [Member] | |||||||||||
| Income Tax Examination [Line Items] | |||||||||||
| Tax loss carry forwards | 16,961 | 13,049 | |||||||||
| Credit carryforwards | 7,902 | 5,710 | |||||||||
| Valuation allowance | $ 35,783 | $ 27,243 | |||||||||
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