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	$ 19	$ 16
Maximum
Defined Contribution Plan Disclosure [Line Items]
Silvercrest matching contribution percentage	4.00%

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration