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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Income Tax Disclosure [Line Items]          
Effective tax rate expense (benefit) 9.30% 150.60% (36.80%) 197.10%  
Income tax benefit, result of CARES act of 2020     $ 7,800    
Effective tax rate reduction related to transfer pricing study   7.10%   7.10%  
Additional change in valuation allowances related to domestic operations $ 1,000        
Additional income tax benefit result of CARES act of 2020 400        
Deferred tax assets, gross 59,104   59,104   $ 56,177
Valuation allowance established against deferred tax assets 51,239   51,239   48,616
Deferred tax assets 7,865   7,865   7,561
Domestic [Member]          
Income Tax Disclosure [Line Items]          
Valuation allowance established against deferred tax assets   $ 37,100 2,600 $ 37,100  
Deferred tax assets, gross 49,212   49,212   46,266
Valuation allowance established against deferred tax assets $ 49,212   $ 49,212   $ 46,266