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Income Taxes - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Taxes [Line Items]      
Provision (benefit) for income taxes $ 3,423,000 $ 3,715,000 $ 2,611,000
Effective income tax rate 12.90% 14.70% (5.10%)
Effective income tax rate, exclusive of discrete items 9.50% 13.60% (5.80%)
Discrete tax benefit (expenses) $ 900,000    
Net deferred tax liabilities 2,293,000 $ 2,622,000  
Deferred tax assets, undistributed earnings of foreign subsidiaries 252,000,000    
Unrecognized tax positions, recognized 1,800,000   $ 300,000
Valuation allowance 100,900,000 106,800,000  
Increase (decrease) in valuation allowance (5,900,000)    
U.S. federal net operating loss carryforwards $ 76,000,000    
U.S. federal net operating loss carryforwards, expiration period Dec. 31, 2031    
Foreign tax credit carryforwards $ 12,600,000    
Foreign tax credit carryforwards, expiration year 2022    
Federal research and development tax credit carryforwards $ 500,000    
Federal research and development tax credit carryforwards, expiration year 2029    
State research and development tax credit carryforwards $ 140,000    
Interest Expense      
Income Taxes [Line Items]      
Interest expense relating to UTPs 0 150,000 $ 120,000
State Of California      
Income Taxes [Line Items]      
U.S. federal net operating loss carryforwards $ 110,000,000    
U.S. federal net operating loss carryforwards, expiration period Dec. 31, 2031    
Reserve for depreciation      
Income Taxes [Line Items]      
De-recognized UTP $ 2,100,000 $ 44,000