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Goodwill - Summary of Changes to Carrying Amount of Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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| Goodwill [Line Items] | ||
| Beginning, Gross balance | $ 37,446us-gaap_GoodwillGross | $ 33,306us-gaap_GoodwillGross |
| Beginning, Accumulated impairment losses | (17,415)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | (17,415)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss |
| Beginning, Net balance | 20,031us-gaap_Goodwill | 15,891us-gaap_Goodwill |
| Purchase price adjustments from earnouts | (23)us-gaap_GoodwillPurchaseAccountingAdjustments | 1,795us-gaap_GoodwillPurchaseAccountingAdjustments |
| Ending, Gross balance | 37,423us-gaap_GoodwillGross | 37,446us-gaap_GoodwillGross |
| Ending, Accumulated impairment losses | (17,415)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | (17,415)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss |
| Ending, Net balance | 20,008us-gaap_Goodwill | 20,031us-gaap_Goodwill |
| Ten-Sixty | ||
| Goodwill [Line Items] | ||
| Goodwill, Acquisition |
2,345us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_BusinessAcquisitionAxis = samg_TenSixtyAssetManagementLlcMember |
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| Ending, Net balance |
$ 2,345us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = samg_TenSixtyAssetManagementLlcMember |
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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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- Definition
Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before 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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- Definition
Amount of accumulated impairment loss for 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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- Details
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- Definition
Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the 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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- Details
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