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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Operating Loss Carryforwards [Line Items]      
Intercompany dividend $ 10,000 $ 30,650 $ 30,752
Statutory tax rate 34.00% 35.00% 35.00%
Long-term deferred tax assets $ 6,216 $ 6,885  
Current deferred tax liabilities 1,752 1,235  
Unremitted foreign earnings available for distribution 22,672 19,849  
Deferred tax liability 137 955  
Amount of Unremitted foreign earnings permanently invested 131,327 83,122  
Amount subject to tax upon repatriation 1,968 (9) $ 212
Amount of restricted stock and stock options tax benefits credited to additional paid-in capital 318 253 3,318
Foreign tax credit carryforwards expire amount $ 3,309    
U.S. foreign tax credit carryforwards expiration 2023    
Net increase (decrease) change in the valuation allowance $ 11,219 101 $ 115
Tax benefit reserve 13,719 2,500  
United States [Member]      
Operating Loss Carryforwards [Line Items]      
Cash in banks 30,018    
Outside United States [Member]      
Operating Loss Carryforwards [Line Items]      
Cash in banks 48,504    
Amount subject to tax upon repatriation 45,520    
Retained earnings to be available for distribution 29,335    
Outside United States [Member] | Permanently Invested [Member]      
Operating Loss Carryforwards [Line Items]      
Retained earnings to be available for distribution 19,169    
Intellectual Property [Member]      
Operating Loss Carryforwards [Line Items]      
Tax benefit reserve $ 560 $ 560