Quarterly report pursuant to Section 13 or 15(d)

Defined Contribution and Deferred Compensation Plans - Additional Information (Detail)

v2.4.1.9
Defined Contribution and Deferred Compensation Plans - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Defined Contribution Plan Disclosure [Line Items]    
Silvercrest matching contributions towards benefit of employees $ 19us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount $ 16us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Maximum    
Defined Contribution Plan Disclosure [Line Items]    
Silvercrest matching contribution percentage 4.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
/ us-gaap_RangeAxis
= us-gaap_MaximumMember