XML 128 R117.htm IDEA: XBRL DOCUMENT
v3.19.2

Fair Value of Financial Assets and Liabilities - Quantitative Information about Level 3 Fair Value Measurements (Detail) $ in Thousands | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
--- | --- | --- | --- | --- | --- | ---
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Assets | $ 73,448 | $ 80,464 | $ 92,528 | $ 49,975 | $ 18,437 | $ 6,676
Liabilities | 68,401 | 46,143 | 49,230 | 36,160 | 34,489 | 26,757
Contingent Consideration [Member] | Accounts Payable, Accrued and Other Liabilities [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Liabilities | $ 38,712 | 31,357 | $ 32,552 | 21,574 | 23,088 | 23,710
Contingent Consideration [Member] | Accounts Payable, Accrued and Other Liabilities [Member] | Minimum [Member] | Measurement Input, Discount Rate [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Unobservable Inputs | 0.003 |  | 0.003 |  |  |
Contingent Consideration [Member] | Accounts Payable, Accrued and Other Liabilities [Member] | Minimum [Member] | Measurement Input, Probability of Meeting Earnout and Contingencies [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Unobservable Inputs | 0.99 |  | 0.99 |  |  |
Contingent Consideration [Member] | Accounts Payable, Accrued and Other Liabilities [Member] | Maximum [Member] | Measurement Input, Discount Rate [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Unobservable Inputs | 0.104 |  | 0.104 |  |  |
Contingent Consideration [Member] | Accounts Payable, Accrued and Other Liabilities [Member] | Maximum [Member] | Measurement Input, Probability of Meeting Earnout and Contingencies [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Unobservable Inputs | 1.00 |  | 1.00 |  |  |
Contingent Consideration [Member] | Accounts Payable, Accrued and Other Liabilities [Member] | Weighted Average [Member] | Measurement Input, Discount Rate [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Unobservable Inputs | 0.081 |  | 0.082 |  |  |
Contingent Consideration [Member] | Accounts Payable, Accrued and Other Liabilities [Member] | Weighted Average [Member] | Measurement Input, Probability of Meeting Earnout and Contingencies [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Unobservable Inputs | 0.995 |  | 0.996 |  |  |
Forward Contracts [Member] | NASDAQ [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Assets | $ 48,652 | 64,290 | $ 77,619 | 19,085 |  |
Forward Contracts [Member] | NASDAQ [Member] | Minimum [Member] | Volatility [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Unobservable Inputs | 0.2775 |  | 0.237 |  |  |
Forward Contracts [Member] | NASDAQ [Member] | Maximum [Member] | Volatility [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Unobservable Inputs | 0.3525 |  | 0.348 |  |  |
Forward Contracts [Member] | NASDAQ [Member] | Weighted Average [Member] | Volatility [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Unobservable Inputs | 0.322 |  | 0.302 |  |  |
Forward Sale Contracts [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Assets | $ 2,845 | 5,964 | $ 8,177 | 16,442 | 9,687 | 3,753
Liabilities | 27,261 | 9,596 | 9,208 | 641 | 2,421 | 657
Rate Lock Commitments [Member] |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |
Assets | 21,951 | 10,210 | 6,732 | 14,448 | 8,750 | 2,923
Liabilities | $ 2,428 | $ 5,190 | $ 7,470 | $ 13,945 | $ 8,980 | $ 2,390

X
- Definition Value of input used to measure contingent consideration liability from business combination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_ContingentConsiderationByTypeAxis=nmrk_ContingentConsiderationLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_AccountsPayableAndAccruedLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=nmrk_MeasurementInputExpectedEarnoutAndContingenciesRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForwardContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=nmrk_NasdaqOmxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPriceVolatilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=nmrk_ForwardSaleContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_InterestRateLockCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |