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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Income Tax Examination [Line Items]      
Corporate income tax rate 21.00%    
Net operating loss carryforward $ 3,700    
Income tax examination years description The Company’s 2015 U.S. Federal income tax return and New York State tax returns for years 2014-2016 remain under audit with no proposed adjustments as of March 31, 2019.    
Income tax (provision) benefit $ (2,458) $ (3,810) $ 3,800
Effective income tax rate     34.10%
Effective income tax rate, change in enacted rate     24.60%
Interest And Penalties Member [Member]      
Income Tax Examination [Line Items]      
Gross liability for tax positions   $ 2,800  
Foreign      
Income Tax Examination [Line Items]      
Effective income tax rate, change in enacted rate   24.60%  
Domestic      
Income Tax Examination [Line Items]      
Effective income tax rate   34.10%