XML 149 R136.htm IDEA: XBRL DOCUMENT
v3.21.2

Compensation - Limited Partnership Units with a Post-Termination Payout (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award |  |
Liability balance acquisition related post-termination units | $ 6,800 |
BGC Holdings, L.P. |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Notional value | 92,426 | $ 257,771
Estimated fair value of the post-termination payout | $ 33,422 | $ 68,682
Outstanding limited partnership units (in shares) | 0 | 4,873,040
Outstanding limited partnership units - unvested (in dollars per share) | 0 | 873,822
NEWMARK Group Inc Parent |  |
Share-based Compensation Arrangement by Share-based Payment Award |  |
Outstanding limited partnership units (in shares) | 9,385,036 | 20,184,716
Outstanding limited partnership units - unvested (in dollars per share) | 5,190,065 | 9,778,078

X
- Definition Liability Balance Acquisition Related Post Termination Units + References No definition available. + Details
Name: | nmrk_LiabilityBalanceAcquisitionRelatedPostTerminationUnits
Namespace Prefix: | nmrk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Notional value of limited partnership units with post termination pay out amount. + References No definition available. + Details
Name: | nmrk_NotionalValueOfLimitedPartnershipUnitsWithPostTerminationPayOutAmount
Namespace Prefix: | nmrk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Share based compensation arrangement by share based payment award equity instruments other than options outstanding grant date fair value. + References No definition available. + Details
Name: | nmrk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingGrantDateFairValue
Namespace Prefix: | nmrk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of limited partner units outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770 + Details
Name: | us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=nmrk_BGCHoldingPartnershipUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |