Silvercrest Asset Management Group LLC Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Acquisitions - Additional Information (Detail)

v3.10.0.1

Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands			6 Months Ended	12 Months Ended
	Dec. 15, 2015	Mar. 30, 2015	Jun. 30, 2018	Dec. 31, 2017
Cappiccille
Business Acquisition [Line Items]
Cash paid on date of acquisition	$ 148
Contingent consideration	$ 354
Earn out payments percentage on revenue remainder of fiscal year	19.00%
Earn out payments percentage on revenue due in two years	19.00%
Earn out payments percentage on revenue due in three years	19.00%
Earn out payments percentage on revenue due in four years	19.00%
Earn out payments percentage on revenue due thereafter	19.00%
Equity consideration for SLP acquired			$ 177	$ 279
Jamison
Business Acquisition [Line Items]
Cash paid on date of acquisition		$ 3,550
Contingent consideration		1,429	$ 472	$ 817
Equity consideration for SLP acquired		$ 3,562
Earn out payments percentage on EBITDA remainder of fiscal year		20.00%
Earn out payments percentage on EBITDA due in two years		20.00%
Earn out payments percentage on EBITDA due in three years		20.00%
Earn out payments percentage on EBITDA due in four years		20.00%
Earn out payments percentage on EBITDA due in five years		20.00%
Earn Out Payments Percentage On EBITDA Due thereafter		20.00%
Jamison \| Seller Note
Business Acquisition [Line Items]
Promissory note issued		$ 394
Interest on principal amount		5.00%
Jamison \| Principals Notes
Business Acquisition [Line Items]
Promissory note issued		$ 1,771
Interest on principal amount		5.00%

- Definition

Business acquisition cost of acquired entity promissory notes issued.

+ References

No definition available.

+ Details

Name:	samg_BusinessAcquisitionCostOfAcquiredEntityPromissoryNotesIssued
Namespace Prefix:	samg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Earn out payments percentage on EBITDA due in five years.

+ References

No definition available.

+ Details

Name:	samg_EarnOutPaymentsPercentageOnEBITDADueInFiveYears
Namespace Prefix:	samg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Earn out payments percentage on EBITDA due in four years.

+ References

No definition available.

+ Details

Name:	samg_EarnOutPaymentsPercentageOnEBITDADueInFourYears
Namespace Prefix:	samg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Earn out payments percentage on EBITDA due in three years.

+ References

No definition available.

+ Details

Name:	samg_EarnOutPaymentsPercentageOnEBITDADueInThreeYears
Namespace Prefix:	samg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Earn out payments percentage on EBITDA due in two years.

+ References

No definition available.

+ Details

Name:	samg_EarnOutPaymentsPercentageOnEBITDADueInTwoYears
Namespace Prefix:	samg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Earn out payments percentage on EBITDA due thereafter.

+ References

No definition available.

+ Details

Name:	samg_EarnOutPaymentsPercentageOnEBITDADueThereafter
Namespace Prefix:	samg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Earn out payments percentage on EBITDA remainder of fiscal year.

+ References

No definition available.

+ Details

Name:	samg_EarnOutPaymentsPercentageOnEBITDARemainderOfFiscalYear
Namespace Prefix:	samg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Earn out payments percentage on revenue due in four years.

+ References

No definition available.

+ Details

Name:	samg_EarnOutPaymentsPercentageOnRevenueDueInFourYears
Namespace Prefix:	samg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Earn out payments percentage on revenue due in three years.

+ References

No definition available.

+ Details

Name:	samg_EarnOutPaymentsPercentageOnRevenueDueInThreeYears
Namespace Prefix:	samg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Earn out payments percentage on revenue due in two years.

+ References

No definition available.

+ Details

Name:	samg_EarnOutPaymentsPercentageOnRevenueDueInTwoYears
Namespace Prefix:	samg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Earn out payments percentage on revenue due thereafter.

+ References

No definition available.

+ Details

Name:	samg_EarnOutPaymentsPercentageOnRevenueDueThereafter
Namespace Prefix:	samg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Earn out payments percentage on revenue remainder of fiscal year.

+ References

No definition available.

+ Details

Name:	samg_EarnOutPaymentsPercentageOnRevenueRemainderOfFiscalYear
Namespace Prefix:	samg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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

- Definition

Amount of increase (decrease) in the value of right to a contingent consideration asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

+ Details

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 35
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

+ Details

Name:	us-gaap_BusinessCombinationContingentConsiderationLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

+ Details

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=samg_CappiccilleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=samg_JamisonMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=samg_SellerNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=samg_PrincipalsNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: