Annual report pursuant to Section 13 and 15(d)

Organization and Business - Additional Information (Detail)

v2.4.1.9
Organization and Business - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended 1 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jul. 31, 2013
Jul. 12, 2013
Jul. 02, 2013
Jun. 26, 2013
Mar. 11, 2004
Dec. 31, 2004
Oct. 03, 2008
Business And Organization [Line Items]                    
Stock issuance costs   $ 1,482us-gaap_PaymentsOfStockIssuanceCosts                
Distribution of partnership units for each limited partnership unit prior to the consummation of the IPO 19.64samg_DistributionOfPartnershipUnitsForEachLimitedPartnershipUnitPriorToConsummationOfInitialPublicOffering                  
Tax receivable agreement with limited partner, percentage of cash savings to be paid 85.00%samg_TaxReceivableAgreementWithLimitedPartnersTaxBenefitPercentageOfCashSavingsToBePaid                  
Recognition of tax receivable agreement liability 15,624samg_RecognitionOfTaxReceivableAgreementLiability 15,271samg_RecognitionOfTaxReceivableAgreementLiability                
Borrowings under revolving credit facility   7,000us-gaap_ProceedsFromLinesOfCredit                
Purchase of Class B units from partners of Silvercrest L.P.   35,365samg_PartnershipUnitsRepurchasedDuringPeriodValue                
Percentage of cash savings expected to be realized 15.00%samg_TaxReceivableAgreementWithLimitedPartnersTaxBenefitPercentageOfCashSavingsExpectedToBeRealized                  
TRA payments totaling 143samg_PaymentsOfTaxReceivableAgreement                  
Number of performance units conditionally issuable     146,452us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares              
SLP                    
Business And Organization [Line Items]                    
Special distribution paid by parent 10,000us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid
/ dei_LegalEntityAxis
= samg_SlpMember 		                 
Borrowings under revolving credit facility 7,000us-gaap_ProceedsFromLinesOfCredit
/ dei_LegalEntityAxis
= samg_SlpMember 		                 
Special bonus payment       754samg_CashBonusAmount
/ dei_LegalEntityAxis
= samg_SlpMember 		           
SLP | Capital Unit, Class B                    
Business And Organization [Line Items]                    
Distribution of partnership units for each limited partnership unit prior to the consummation of the IPO 19.64samg_DistributionOfPartnershipUnitsForEachLimitedPartnershipUnitPriorToConsummationOfInitialPublicOffering
/ us-gaap_CapitalUnitsByClassAxis
= us-gaap_CapitalUnitClassBMember
/ dei_LegalEntityAxis
= samg_SlpMember 		                 
Class B partnership units issued 10,000,000us-gaap_LimitedPartnersCapitalAccountUnitsIssued
/ us-gaap_CapitalUnitsByClassAxis
= us-gaap_CapitalUnitClassBMember
/ dei_LegalEntityAxis
= samg_SlpMember 		                 
Number of partnership units purchased from partners 3,540,684samg_PartnershipUnitsRepurchasedDuringPeriodUnits
/ us-gaap_CapitalUnitsByClassAxis
= us-gaap_CapitalUnitClassBMember
/ dei_LegalEntityAxis
= samg_SlpMember 		                 
Initial public offering shares price $ 11.00samg_PartnershipUnitsRepurchasedDuringPeriodPricePerShare
/ us-gaap_CapitalUnitsByClassAxis
= us-gaap_CapitalUnitClassBMember
/ dei_LegalEntityAxis
= samg_SlpMember 		                 
Purchase of Class B units from partners of Silvercrest L.P. 35,365samg_PartnershipUnitsRepurchasedDuringPeriodValue
/ us-gaap_CapitalUnitsByClassAxis
= us-gaap_CapitalUnitClassBMember
/ dei_LegalEntityAxis
= samg_SlpMember 		                 
Underwriting discounts and commissions 2,457samg_UnderwritingDiscountsAndCommissions
/ us-gaap_CapitalUnitsByClassAxis
= us-gaap_CapitalUnitClassBMember
/ dei_LegalEntityAxis
= samg_SlpMember 		                 
Estimated offering expenses 1,126samg_OfferingExpenses
/ us-gaap_CapitalUnitsByClassAxis
= us-gaap_CapitalUnitClassBMember
/ dei_LegalEntityAxis
= samg_SlpMember 		                 
Class A Common Stock                    
Business And Organization [Line Items]                    
Number of shares held by parent             7,768,010samg_NumberOfCommonSharesHeldByParent
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		     
Percentage ownership in a consolidated subsidiary 63.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		63.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		        63.00%us-gaap_MinorityInterestOwnershipPercentageByParent
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		     
Issuance of Class A shares in IPO, Shares   5,509,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		    718,603us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		4,790,684us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		       
Initial public offering shares price         $ 11.00samg_InitialPublicOfferingPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		$ 11.00samg_InitialPublicOfferingPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		       
Net proceeds from IPO         7,379us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		47,920us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		       
Gross proceeds from IPO         7,905samg_GrossProceedsFromIssuanceInitialPublicOffering
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		         
Common stock, shares outstanding 7,768,010us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		7,522,974us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		    5,509,297us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		         
Class A Common Stock | Underwriting Discounts and Commissions                    
Business And Organization [Line Items]                    
Stock issuance costs         498us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_NatureOfExpenseAxis
= samg_UnderwritingDiscountMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		3,324us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_NatureOfExpenseAxis
= samg_UnderwritingDiscountMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		       
Class A Common Stock | Stock Offering Expenses                    
Business And Organization [Line Items]                    
Stock issuance costs         $ 28us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_NatureOfExpenseAxis
= samg_OfferingCostsMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		$ 1,454us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_NatureOfExpenseAxis
= samg_OfferingCostsMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember 		       
Silvercrest Financial Services Inc                    
Business And Organization [Line Items]                    
Percentage of outstanding shares acquired               100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= samg_SilvercrestFinancialServicesIncMember 		   
Sam Alternative Solutions Inc                    
Business And Organization [Line Items]                    
Percentage of outstanding shares acquired                 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= samg_SamAlternativeSolutionsIncMember 		 
Marathon Capital Group, LLC                    
Business And Organization [Line Items]                    
Percentage of outstanding shares acquired                   100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= samg_MarathonCapitalGroupLlcMember