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Compensation - Narrative (Details) |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Apr. 04, 2023 shares | Mar. 31, 2023 USD ($) shares | Mar. 31, 2022 USD ($) shares | Dec. 31, 2022 shares | Dec. 31, 2021 shares | Dec. 13, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Shares available for future awards (in shares) |  | 317,000,000 |  |  |  |
Limited partnership units exchange ratio |  | 0.4545 |  |  |  |
Issuance of common stock and exchangeability expenses | $ |  | $ 24,583,000 | $ 8,983,000 |  |  |
Number of shares vested and converted (in shares) |  | 2,500,000 | 2,400,000 |  |  |
Unrecognized compensation expense related to unvested RSUs | $ |  | $ 98,200,000 |  |  |  |
Limited Partnership Units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Issuance of common stock and exchangeability expenses | $ |  | $ 0 | $ 0 |  |  |
Executives and Non Executives Employees |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Limited partners capital account units held by BGC (in shares) |  | 83,000,000 |  |  |  |
Non Distribution Earning Units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Award vesting period |  | 4 years |  |  |  |
Unit granted during period (in shares) |  | 1,100,000 | 900,000 |  |  |
Newmark Holdings, L.P. |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Limited partnership units exchange ratio |  | 0.4545 |  |  |  |
NEWMARK Group Inc Parent |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Limited partners capital account units held by BGC (in shares) |  | 15,284,618 |  | 14,277,213 |  |
Limited partnership units outstanding (in shares) |  | 32,860,605 |  | 30,687,954 | 18,419,613 |
NEWMARK Group Inc Parent | Limited Partnership Units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Limited partnership units outstanding (in shares) |  | 3,700,000 |  | 3,900,000 |  |
Exchangeable partnership units (in shares) |  | 1,400,000 |  | 1,500,000 |  |
NEWMARK Group Inc Parent | Limited Partnership Units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Issuance of common stock and exchangeability expenses | $ |  | $ 24,583,000 | $ 8,983,000 |  |  |
BGC Holdings, L.P. |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Limited partnership units outstanding (in shares) |  | 5,149,535 |  | 5,459,388 | 8,663,930 |
BGC Holdings, L.P. | Limited Partnership Units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Limited partnership units outstanding (in shares) |  | 4,600,000 |  | 4,800,000 |  |
Exchangeable partnership units (in shares) |  | 2,300,000 |  | 2,500,000 |  |
Maximum | NEWMARK Group Inc Parent | Limited Partnership Units |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Award vesting period |  | 7 years |  |  |  |
Class A Common Stock |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Limited partnership units exchange ratio |  |  |  |  |  | 1
Class A Common Stock | NEWMARK Group Inc Parent |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Limited partnership units exchange ratio |  | 0.9252 |  |  |  |
Newmark Equity Plan | Class A Common Stock | Subsequent Event |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Additional shares authorized to be delivered pursuant to awards granted (in shares) | 100,000,000 |  |  |  |  |
Newmark Equity Plan | Class A Common Stock | Maximum |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |  |  |  |  |
Shares authorized to be delivered pursuant to awards granted (in shares) |  |  |  |  |  | 400,000,000
Shares registered to be delivered pursuant to awards granted (in shares) |  |  |  |  |  | 115,000,000

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