Acquisitions - Summary of Final Amounts Allocated to Acquired Assets and Assumed Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Business Acquisition [Line Items] | |||
Goodwill | $ 20,008us-gaap_Goodwill | $ 20,031us-gaap_Goodwill | $ 15,891us-gaap_Goodwill |
MW Commodity Advisors, LLC | |||
Business Acquisition [Line Items] | |||
Receivables |
7us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = samg_MwCommodityAdvisorsLlcMember |
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Liabilities |
(7)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities / us-gaap_BusinessAcquisitionAxis = samg_MwCommodityAdvisorsLlcMember |
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Total fair value of net tangible assets acquired |
0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = samg_MwCommodityAdvisorsLlcMember |
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Goodwill |
147us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = samg_MwCommodityAdvisorsLlcMember |
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Total purchase consideration |
147us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = samg_MwCommodityAdvisorsLlcMember |
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Ten-Sixty | |||
Business Acquisition [Line Items] | |||
Total fair value of net tangible assets acquired |
0us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = samg_TenSixtyAssetManagementLlcMember |
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Goodwill |
2,345us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = samg_TenSixtyAssetManagementLlcMember |
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Total purchase consideration |
4,092us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = samg_TenSixtyAssetManagementLlcMember |
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Ten-Sixty | Customer Relationships | |||
Business Acquisition [Line Items] | |||
Intangible asset |
1,650us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = samg_TenSixtyAssetManagementLlcMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember |
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Ten-Sixty | Non-compete Agreements | |||
Business Acquisition [Line Items] | |||
Intangible asset |
$ 97us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = samg_TenSixtyAssetManagementLlcMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember |
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- Definition
Amount of assets acquired at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of identifiable intangible assets recognized as of the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of liabilities assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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