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Taxes - Additional Information (Detail)
 3 Months Ended 12 Months Ended
Apr. 01, 2012
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2010
JPY (¥)
Dec. 31, 2012
Alternative minimum [Member]
USD ($)
Dec. 31, 2012
Foreign Country [Member]
USD ($)
Dec. 31, 2012
Research [Member]
USD ($)
Dec. 31, 2012
State Research and Experimentation [Member]
USD ($)
Dec. 31, 2012
Research and Development tax credit [Member]
USD ($)
Tax Credit Carryforward [Line Items]                    
Domestic income from continuing operations before taxes   $ 36,754,000 $ 24,836,000 $ 19,424,000            
Foreign income from continuing operations before taxes   49,876,000 62,281,000 56,679,000            
Increase (decrease) in tax expense upon the expiration of the statutes of limitation for certain reserves for income tax uncertainties   441,000 808,000 105,000            
Increase (decrease) in tax expense for the finalization of advanced pricing agreement     155,000              
Increase (decrease) in tax expense for the final true-up of the prior year's tax accrual upon filing the actual tax returns   84,000 574,000 151,000            
Increase (decrease) in tax expense from write down of noncurrent deferred tax asset   101,000 201,000              
Increase (decrease) in interest and penalties   58,000 2,000 228,000            
Increase (decrease) in tax expense of due to the settlement of the competent Authority tax case with Japan       462,000            
Increase (decrease) in tax expense from the receipt of state refund       124,000            
Provision for effective tax rate   21.00% 20.00% 19.00% 19.00%          
Effective discrete tax rate       20.00% 20.00%          
Reduction in tax expense           1,668,000 3,569,000   4,510,000 555,000
Reserve for income taxes, total   5,216,000 5,354,000              
Reserve for income taxes, current     558,000              
Interest and penalties, gross   1,192,000 1,206,000              
Reserve for income taxes, noncurrent   5,216,000 4,796,000              
Minimum decrease in income tax expense due to release in reserves   1,500,000                
Maximum decrease in income tax expense due to release in reserves   1,800,000                
Tax years open to examination by various taxing authorities   2008 through 2011                
Company's deposit returned with interest       9,336,000 766,257,300          
Tax years covered through Advanced Pricing Agreement     2006 through 2011              
Valuation allowance   1,911,000         2,457,000 546,000    
Alternative minimum tax credits unlimited life and the foreign tax credits   Between 2019 and 2022                
Recognized a deferred tax asset   520,000 609,000              
Establishment of Deferred Tax Assets for Capital Loss Carryforwards   373,000 373,000              
Non deductible federal and state liabilities   4,945,000 6,244,000              
Income from expiration of the statute of limitations relating to a tax 141,000                  
Income tax paid net   13,551,000 18,389,000 8,019,000            
Amount paid to conclude the Japan competent authority case       $ 2,526,000