Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Income Taxes Disclosure [Line Items]          
Net deferred tax assets $ 11,980   $ 11,980   $ 11,612
Net deferred tax asset 12,136   12,136   $ 11,838
Net Deferred tax liabilities relating to non-controlling interests 61   61    
Current tax expense 1,250 $ 1,063 2,411 $ 2,064  
Corporate tax expense 701   1,299    
Deferred tax expense 81 476 211 907  
Provision for income taxes 1,331 1,539 $ 2,622 2,971  
Additional tax benefits expense on discrete items   29   32  
Corporate tax rate     21.00%   35.00%
Income tax settlement     The amount recognized is measured as the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement    
Non-controlling Interest          
Income Taxes Disclosure [Line Items]          
Current tax expense 214 199 $ 442 382  
Deferred tax expense (12) 2 (28) 4  
Provision for income taxes 202 $ 201 414 $ 386  
Silvercrest L.P          
Income Taxes Disclosure [Line Items]          
Net deferred tax asset 12,136   12,136   $ 11,838
Net deferred tax liability 103   103   113
Corporate tax expense 547   1,109    
Silvercrest Financial Services Inc          
Income Taxes Disclosure [Line Items]          
Net deferred tax liability 53   53   $ 113
Corporate tax expense $ 2   $ 3