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Income Taxes (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
USD ($)
manufacturing_facility
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
manufacturing_facility
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Income Tax Disclosure [Abstract]          
Income tax expense (benefit) $ 421 $ 2,185 $ 2,956 $ 5,624  
Effective tax rate 5.10% 25.80% 14.70% 22.10%  
Unrecognized tax benefits $ 3,700   $ 3,700    
Unrecognized tax benefits that would impact effective rate 2,100   2,100    
Decrease in unrecognized tax benefits is reasonably possible in next 12 months 100   100    
Accrued interest and penalties 300   300   $ 200
State Administration of Taxation, China [Member]          
Income Taxes [Line Items]          
Tax refunds 1,800   1,300    
Income tax incentives 1,400   900    
Deductible research and development expenses 400   400    
Decrease to the carrying value of deferred tax assets $ 700   $ 700    
Number of manufacturing facilities receiving tax incentives | manufacturing_facility 1   1