XML 147 R134.htm IDEA: XBRL DOCUMENT
v3.21.2

Compensation - Activity Associated with Limited Partnership Units (Details) - shares | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
NEWMARK Group Inc Parent |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding |  |
Beginning balance (in shares) | 66,626,185 | 60,800,852
Number of units, Issued (in shares) | 3,150,687 | 12,569,298
Number of units, Redeemed/exchanged units (in shares) | (55,400,901) | (6,660,984)
Number of units, Forfeited units (in shares) | (159,249) | (82,981)
Ending balance (in shares) | 14,216,722 | 66,626,185
Exchangeable Units (units) | 2,639,129 | 9,906,763
BGC Holdings, L.P. |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding |  |
Beginning balance (in shares) | 54,422,002 | 56,053,701
Number of units, Issued (in shares) | 159,057 | 1,071,612
Number of units, Redeemed/exchanged units (in shares) | (40,868,931) | (2,657,901)
Number of units, Forfeited units (in shares) | (848,822) | (45,410)
Ending balance (in shares) | 12,863,306 | 54,422,002
Exchangeable Units (units) | 4,167,701 | 24,863,107
Regular units | NEWMARK Group Inc Parent |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding |  |
Ending balance (in shares) | 12,633,815 |
Regular units | BGC Holdings, L.P. |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding |  |
Ending balance (in shares) | 12,679,287 |
Preferred Units | NEWMARK Group Inc Parent |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding |  |
Ending balance (in shares) | 1,582,907 |
Preferred Units | BGC Holdings, L.P. |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding |  |
Ending balance (in shares) | 184,019 |

X
- Definition Exchangeable Units + References No definition available. + Details
Name: | nmrk_ExchangeableUnits
Namespace Prefix: | nmrk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of exchangeable limited partnership units redeemed or exchanged into the Company's class A common stock during the period. + References No definition available. + Details
Name: | nmrk_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentRedeemedExchanged
Namespace Prefix: | nmrk_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event. + 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)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net number of non-option equity instruments granted to participants. + 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)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of equity instruments other than options outstanding, including both vested and non-vested instruments. + 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)(1)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=nmrk_RegularUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=nmrk_PreferredUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |