Quarterly report pursuant to sections 13 or 15(d)

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

v2.4.0.8
Defined Contribution and Deferred Compensation Plans - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Defined Contribution Plan Disclosure [Line Items]        
Silvercrest matching contributions towards benefit of employees $ 17 $ 18 $ 33 $ 36
Maximum [Member]
       
Defined Contribution Plan Disclosure [Line Items]        
Silvercrest matching contribution percentage     4.00%