XML 141 R126.htm IDEA: XBRL DOCUMENT v3.25.4

Related Party Transactions - Transactions with Executive Officers and Directors (Howard & Brandon Lutnick) (Details)									1 Months Ended			3 Months Ended	12 Months Ended
	Oct. 06, 2025 USD ($) shares	May 19, 2025 shares	May 16, 2025 $ / shares shares	Feb. 05, 2025 $ / shares shares	Jan. 13, 2025 $ / shares shares	Sep. 23, 2024 $ / shares shares	Jan. 02, 2024 USD ($) shares	Dec. 27, 2021 USD ($)	Dec. 31, 2025 $ / shares shares	Nov. 30, 2025 $ / shares shares	Oct. 31, 2025 $ / shares shares	Jun. 30, 2025 $ / shares shares	Dec. 31, 2025 $ / shares shares	Dec. 31, 2024 $ / shares shares	Dec. 31, 2023 shares	Jan. 02, 2025 shares	Oct. 23, 2024 USD ($) shares
Related Party Transaction
Share price (in dollars per share) | $ / shares				$ 14.14	$ 11.93	$ 15.34
Stock repurchased (in shares)						795,376								68,346	0
Related party transaction, award payment term								3 years
Class A Common Stock
Related Party Transaction
Treasury stock repurchases (in shares)									0	0	134,259	10,839,674	10,973,933	17,729,096	5,785,370
Shares repurchased price (in dollars per share) | $ / shares									$ 0	$ 0	$ 11.50	$ 11.58	$ 11.58	$ 11.99
Stock repurchased, gross (in shares)				2,653,272
Shares withheld for tax withholding obligation (in shares)					232,380
Stock repurchased (in shares)				1,309,367	186,732
Mr. Lutnick
Related Party Transaction
Shares repurchased price (in dollars per share) | $ / shares			$ 11.58
Cash payment | $							$ 1,250,000
Mr. Lutnick | Rights for Previously Non-Exchangeable PSUs
Related Party Transaction
Warrants and rights outstanding (in shares)				1,148,970			617,262									101,133	712,347
Class of warrant or right, number of securities called by warrants or rights (in shares)				1,148,970			617,262									101,133	712,347
Class of warrant or right, issued upon conversion (in shares)				2,859,437
Class of warrant or right, conversion ratio				0.9279
Stock repurchased, gross (in shares)					419,112
Shares withheld for tax withholding obligation (in shares)				1,343,905
Mr. Lutnick | Rights for Monetization of Previously Awarded Nonexchangeable PPSUs
Related Party Transaction
Warrants and rights outstanding (in shares)							81,275										81,275
Class of warrant or right, cash payment called by warrants or rights | $							$ 1,250,000										$ 1,250,000
Mr. Lutnick | Non-Exchangeable Rights for Newmark Holdings PSUs/NPSUs
Related Party Transaction
Class of warrant or right, waived (in shares)							617,262
Mr. Lutnick | Non-Exchangeable Rights for Newmark Holdings PPSUs
Related Party Transaction
Class of warrant or right, waived (in shares)							81,275
Sale of Class A Common Stock to Company | Mr. Lutnick
Related Party Transaction
Treasury stock repurchases (in shares)			10,969,533
Shares repurchased price (in dollars per share) | $ / shares			$ 11.58
Treasury stock repurchases | $	$ 13,096,795.7
Sale of Class A Common Stock to Company | Mr. Lutnick | Mr. Lutnick
Related Party Transaction
Treasury stock repurchases (in shares)			7,989,936
Sale of Class A Common Stock to Company | Mr. Lutnick | Personal Asset Trust
Related Party Transaction
Treasury stock repurchases (in shares)			2,843,781
Sale of Class A Common Stock to Company | Mr. Lutnick | Family Trust
Related Party Transaction
Treasury stock repurchases (in shares)			3,384
Sale of Class A Common Stock to Company | Mr. Lutnick | Spouse
Related Party Transaction
Treasury stock repurchases (in shares)	4,400		2,573
Sale of Class A Common Stock to Company | Mr. Lutnick | Howard W. Lutnick, Spouse and Trusts
Related Party Transaction
Treasury stock repurchases (in shares)	129,859	10,839,674	129,859
Sale of Class A Common Stock to Company | Mr. Lutnick | CF Group Management, Inc.
Related Party Transaction
Treasury stock repurchases | $	$ 200,000
Retention Bonus Agreement | Mr. Lutnick
Related Party Transaction
Aggregate cash payments | $								$ 50,000,000
Retention Bonus Agreement, Payment Within Three Days | Mr. Lutnick
Related Party Transaction
Aggregate cash payments | $								20,000,000
Retention Bonus Agreement, Payment Within Thirty Days | Mr. Lutnick
Related Party Transaction
Aggregate cash payments | $								$ 10,000,000

X

- Definition

Class of Warrant Or Right, Cash Payment Called By Warrants or Rights

+ References

No definition available.

+ Details

Name:	nmrk_ClassOfWarrantOrRightCashPaymentCalledByWarrantsOrRights
Namespace Prefix:	nmrk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Class Of Warrant Or Right, Cash Waived

+ References

No definition available.

+ Details

Name:	nmrk_ClassOfWarrantOrRightCashWaived
Namespace Prefix:	nmrk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Class Of Warrant Or Right, Conversion Ratio

+ References

No definition available.

+ Details

Name:	nmrk_ClassOfWarrantOrRightConversionRatio
Namespace Prefix:	nmrk_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Class Of Warrant Or Right, Issued Upon Conversion

+ References

No definition available.

+ Details

Name:	nmrk_ClassOfWarrantOrRightIssuedUponConversion
Namespace Prefix:	nmrk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Class Of Warrant Or Right, Waived

+ References

No definition available.

+ Details

Name:	nmrk_ClassOfWarrantOrRightWaived
Namespace Prefix:	nmrk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Payments For Related Party Transactions

+ References

No definition available.

+ Details

Name:	nmrk_PaymentsForRelatedPartyTransactions
Namespace Prefix:	nmrk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Related Party Transaction, Award Payment Term

+ References

No definition available.

+ Details

Name:	nmrk_RelatedPartyTransactionAwardPaymentTerm
Namespace Prefix:	nmrk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Stock Redeemed Or Called During Period, Shares, Gross

+ References

No definition available.

+ Details

Name:	nmrk_StockRedeemedOrCalledDuringPeriodSharesGross
Namespace Prefix:	nmrk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Stock Redeemed Or Called During Period, Shares Withheld For Tax Withholding Obligation, Shares

+ References

No definition available.

+ Details

Name:	nmrk_StockRedeemedOrCalledDuringPeriodSharesWithheldForTaxWithholdingObligationShares
Namespace Prefix:	nmrk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 850
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483326/850-10-50-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-13

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(g)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of stock bought back by the entity at the exercise price or redemption price.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

+ Details

Name:	us-gaap_StockRedeemedOrCalledDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481549/505-30-45-1

+ Details

Name:	us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

+ Details

Name:	us-gaap_TreasuryStockSharesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481549/505-30-45-1

+ Details

Name:	us-gaap_TreasuryStockValueAcquiredCostMethod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_BoardOfDirectorsChairmanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=nmrk_RightsForPreviouslyNonExchangeablePSUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=nmrk_RightsForMonetizationOfPreviouslyAwardedNonexchangeablePPSUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=nmrk_NonExchangeableRightsForNewmarkHoldingsPSUsNPSUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=nmrk_NonExchangeableRightsForNewmarkHoldingsPPSUsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=nmrk_SaleOfClassACommonStockToCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=nmrk_HowardW.LutnickMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=nmrk_HowardW.LutnickPersonalAssetTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=nmrk_HowardW.LutnickFamilyTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=nmrk_HowardW.LutnickSpouseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=nmrk_HowardW.LutnickSpouseAndTrustsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CounterpartyNameAxis=nmrk_CFGroupManagementInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=nmrk_RetentionBonusAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=nmrk_RetentionBonusAgreementPaymentWithinThreeDaysMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=nmrk_RetentionBonusAgreementPaymentWithinThirtyDaysMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: