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Taxation - Narrative (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Cash taxes payable |  |  | $ 500,000 |  |
Stock compensation deferred tax asset |  |  | 1,100,000 |  |
Deferred tax assets, state taxes |  |  | 41,800,000 |  |
Deferred tax assets |  |  | 31,400,000 |  |
Investments |  |  | 24,100,000 |  |
Operating loss carryforwards |  |  | 7,300,000 |  |
Valuation allowance against deferred tax assets decreased |  |  | 10,400,000 |  |
Income tax benefit |  |  | (10,043,000) | $ 15,379,000 | $ 16,593,000
Excess tax basis |  | $ 148,089,000 | 159,189,000 | 148,089,000 |
Valuation allowance, deferred tax asset |  | 176,167,000 | 165,748,000 | 176,167,000 |
Unrecognized tax benefits |  | 0 | $ 123,000 | 0 | $ 0
Tax benefit distributions to noncontrolling interest holders, percent |  |  | 85.00% |  |
Tax benefit retained by parent, percent |  |  | 15.00% |  |
Tax receivable agreement, fair value |  | 2,200,000 |  | 2,200,000 |
Tax receivable agreement liability |  | 2,180,000 | $ 39,829,000 | 2,180,000 |
Expense related to tax receivable agreement liability | $ 34,800,000 |  | 37,600,000 |  |
Interest and other income (expense), net |  | 1,600,000 | 32,200,000 | 1,600,000 |
Payments for tax receivable agreements |  |  | 200,000 | 0 |
Domestic Tax Jurisdiction |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  | 87,800,000 |  |
Domestic Tax Jurisdiction | Tax Year 2044 Through 2045 | Research Tax Credit Carryforward |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  | 600,000 |  |
State and Local Jurisdiction |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  | 55,900,000 |  |
State and Local Jurisdiction | Indefinite |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  | 12,300,000 |  |
State and Local Jurisdiction | Tax Year 2026 Through 2044 |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  | 43,600,000 |  |
Foreign Tax Authority |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  | 110,900,000 |  |
Foreign Tax Authority | Indefinite |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  | 14,400,000 |  |
Foreign Tax Authority | Tax Year 2036 Through 2044 |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  |  | 96,500,000 |  |
THG Unit Exchange |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Income tax benefit |  |  | 24,500,000 |  |
Income tax partially offset |  |  | 14,100,000 |  |
Excess tax basis |  | 148,100,000 | 159,200,000 | 148,100,000 |
Valuation allowance, deferred tax asset |  | $ 148,100,000 | $ 133,200,000 | 148,100,000 |
Expense related to tax receivable agreement liability | $ 5,600,000 |  |  | $ 29,200,000 |

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