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v3.21.2

Limited Partnership Interests in Newmark Holdings and BGC Holdings (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2021 tranche shares | Dec. 31, 2019 | Dec. 13, 2017
Related Party Transaction |  |  |  |  |  |  |
Payout period for post-termination awards |  |  |  |  | 4 years |  |
Percentage to preferred units (in percentage) | 0.6875% | 0.6875% | 0.6875% | 0.6875% |  | 2.75% |
Non Distribution Earning Units |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Award vesting period (in years) |  |  |  |  | 4 years |  |
Common Class A |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Limited partnership units exchange ratio (in percentage) |  |  |  |  |  |  | 1
Common Class B | Cantor |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Exchangeable partnership units (in shares) |  |  |  |  | 23,700,000 |  |
Share converted (in shares) |  |  |  |  | 1 |  |
Newmark OpCo | RBC |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Exchangeable preferred limited partnership units, number of tranches | tranche |  |  |  |  | 4 |  |
NEWMARK Group Inc Parent | Common Class A |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Limited partnership units exchange ratio (in percentage) |  |  |  |  | 0.9403 |  |

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