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Compensation - Compensation Expense Related to Limited Partnership Units and Restricted Stock Units (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Issuance of common stock and exchangeability expenses | $ 45,970,000 | $ 30,059,000 | $ 135,202,000 | $ 78,017,000
Total compensation expense | 0 | 0 | 0 | 0
Equity-based compensation and allocations of net income to limited partnership units and FPUs |  |  | 215,610,000 | 125,678,000
Newmark Holdings Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Total compensation expense | 68,838,000 | 43,523,000 | 200,755,000 | 119,675,000
Equity-based compensation and allocations of net income to limited partnership units and FPUs | 81,124,000 | 48,749,000 | 215,610,000 | 125,678,000
Newmark Holdings Units | Restricted Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Limited partnership units amortization | 15,326,000 | 4,994,000 | 41,691,000 | 18,672,000
Total compensation expense | 7,900,000 |  | 7,900,000 |
Newmark Holdings Units | Limited Partnership Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |
Issuance of common stock and exchangeability expenses | 45,970,000 | 30,059,000 | 135,202,000 | 78,017,000
Limited partnership units amortization | 7,542,000 | 8,470,000 | 23,862,000 | 22,986,000
Allocations of net income to limited partnership units and FPUs | $ 12,286,000 | $ 5,226,000 | $ 14,855,000 | $ 6,003,000

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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