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Income Taxes and Tax Receivable Agreement - Schedule of Deferred Tax Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Deferred tax assets |  |
Investment in Black Rock OpCo | $ 51,204 | $ 0
Net operating loss carryforwards | 1,455 | 0
Credit carryforwards | 103 | 0
Charitable contribution carryforward | 2 | 0
Total deferred tax assets | 52,764 | 0
Less: valuation allowance | 0 | 0
Net deferred tax assets | $ 52,764 | $ 0

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible charitable contribution carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-6 + Details
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