XML 64 R53.htm IDEA: XBRL DOCUMENT
v3.25.3

Financial Guarantee Liability (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Guarantees [Abstract] |
Schedule of Provisions for Risk Sharing | The provisions for risk-sharing were included in “Operating, administrative and other” on the accompanying unaudited condensed consolidated statements of operations as follows (in thousands):
Balance, January 1, 2024 | $ | 28,551 |
Provision for expected credit losses | (1,891) |
Credit loss settlement | (345) |
Balance, December 31, 2024 | $ | 26,315 |
Provision for expected credit losses | 5,172 |
Balance, September 30, 2025 | $ | 31,487 |

X
- Definition Schedule of provision for risk sharing obligations. + References No definition available. + Details
Name: | nmrk_ScheduleOfProvisionForRiskSharingObligationsTableTextBlock
Namespace Prefix: | nmrk_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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