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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Taxes [Line Items]        
Tax Cuts and Jobs Act of 2017, provisional tax charge   $ 15,000    
Tax Cuts and Jobs Act of 2017, provisional tax charge, subsequent adjustment $ 4,900      
Increase in deferred tax assets valuation allowance 12,700      
Unrecognized tax benefit 28,406 27,237 $ 24,278 $ 21,079
Net unrecognized tax benefits that, if recognized, would favorably impact the effective income tax rate 27,500 25,900    
Decrease in unrecognized tax benefits due to the expiration of statutes of limitations and the settlement of various audits 3,900      
Accrued interest and penalties related to income tax liabilities 1,200 1,200    
Aggregate amount of interest and penalties expense (benefit) recorded in the statement of operations $ 0 (800) $ (200)  
Tax Cuts and Jobs Act of 2017, one-time transition tax on certain unremitted foreign earnings   $ 20,900    
Effective income tax rate 21.00% 35.00%    
Deferred tax assets, valuation allowance $ 20,415 $ 7,808    
Tax expense for current impact of GILTI provisions 2,100      
Tax Cuts and Jobs Act of 2017, one-time transition tax on certain unremitted foreign earnings, subsequent adjustment 8,100      
Other Noncurrent Liabilities [Member]        
Income Taxes [Line Items]        
Unrecognized tax benefit $ 22,600 $ 21,500    
Foreign Entities        
Income Taxes [Line Items]        
Deferred tax assets operating loss carry forwards, expiration period 17 years      
Deferred tax assets operating loss carry forwards subject to expiration $ 34,600      
Tax credits expiration year 2022      
Deferred tax assets operating loss carry forwards subject to expiration $ 32,500      
Valuation allowance against the tax benefit associated with NOLs 30,200      
Valuation allowance against tax credit $ 15,500      
Foreign Entities | Earliest Tax Year [Member]        
Income Taxes [Line Items]        
Tax years open for audit 2003      
Foreign Entities | Latest Tax Year [Member]        
Income Taxes [Line Items]        
Tax years open for audit 2017      
Other Foreign Jurisdiction [Member]        
Income Taxes [Line Items]        
Deferred tax assets operating loss carry forwards, expiration period 7 years      
Deferred tax assets operating loss carry forwards subject to expiration $ 1,500      
Valuation allowance against tax credit 1,100      
Tax credit carryforwards with indefinite life $ 1,100      
Domestic Federal        
Income Taxes [Line Items]        
Deferred tax assets operating loss carry forwards expiration year 2019      
Tax credits expiration year 2019      
General business tax credit carryforwards $ 12,500      
Deferred tax assets operating loss carry forwards subject to expiration 72,400      
Valuation allowance against the tax benefit associated with NOLs $ 1,000      
State and Local Jurisdiction        
Income Taxes [Line Items]        
Deferred tax assets operating loss carry forwards expiration year 2019      
Tax credits expiration year 2022      
General business tax credit carryforwards $ 700      
Deferred tax assets, valuation allowance 1,100      
Deferred tax assets operating loss carry forwards subject to expiration 1,800      
Valuation allowance against the tax benefit associated with NOLs $ 1,000      
India Tax Authority        
Income Taxes [Line Items]        
Income tax examination description The Company's Indian income tax returns covering fiscal years 2003, 2005, and 2010 through 2013 are under audit by the Indian tax authority.