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Stock Transactions and Unit Redemptions - Schedule of Changes in Shares of Common Stock Outstanding (Details) - Class A Common Stock - shares | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | May 31, 2024 | Apr. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |
Shares outstanding at beginning of period (in shares) |  |  | 152,681,596 | 152,681,596 | 152,639,359 | 153,142,810 | 152,639,359 | 150,384,605
Share issuances: |  |  |  |  |  |  |  |
LPU redemption/exchange (in shares) |  |  |  | 2,978,758 |  | 1,158,346 | 5,167,941 | 3,086,251
Other (in shares) |  |  |  | (145,034) |  | 1,051 | 101,392 | (154,189)
Treasury stock repurchases (in shares) | (1,618,619) | (3,884,084) | 0 | (5,502,703) | (3,463,399) | (2,354,217) | (8,966,102) | (2,354,217)
Shares outstanding at end of period (in shares) | 150,384,929 |  |  | 150,384,929 | 152,681,596 | 152,234,598 | 150,384,929 | 152,234,598
Restricted Stock Units |  |  |  |  |  |  |  |
Share issuances: |  |  |  |  |  |  |  |
Issuance of Class A common stock for Newmark RSUs (in shares) |  |  |  | 372,312 |  | 286,608 | 1,442,339 | 1,272,148

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