XML 170 R155.htm IDEA: XBRL DOCUMENT
v3.25.4

Compensation - Schedule of Compensation Expense Related to Issuance of Common Stock and Grants of Exchangeability (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Share-Based Payment Arrangement [Abstract] |  |  |
Issuance of common stock and exchangeability expenses | $ 165,797 | $ 110,973 | $ 85,918

X
- Definition Common Stock, Exchangeability Granted, Issued, Expense + References No definition available. + Details
Name: | nmrk_CommonStockExchangeabilityGrantedIssuedExpense
Namespace Prefix: | nmrk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration