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Derivatives (Foreign Exchange Contracts) (Details)
€ in Thousands, ₨ in Thousands, £ in Thousands, CAD in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
EUR (€)
Jun. 30, 2015
GBP (£)
Jun. 30, 2015
CAD
Jun. 30, 2015
INR (₨)
Derivative [Line Items]                
Foreign currency transaction gain (loss) $ (100) $ 0 $ (100) $ 400        
Sells euro (EUR)/Buys USD Forward                
Derivative [Line Items]                
Derivative, Notional Amount 5,916   $ 5,916   € 5,500      
Maturity of Foreign Currency Derivatives     Jul. 02, 2015          
Sells Indian rupee (INR)/Buys USD Forward                
Derivative [Line Items]                
Derivative, Notional Amount 6,553   $ 6,553         ₨ 456,000
Maturity of Foreign Currency Derivatives     Dec. 30, 2016          
Sells pound sterling (GBP)/Buys USD Forward                
Derivative [Line Items]                
Derivative, Notional Amount 4,433   $ 4,433     £ 3,000    
Maturity of Foreign Currency Derivatives     Jul. 02, 2015          
Sells Canadian dollar (CAD)/Buys USD Forward                
Derivative [Line Items]                
Derivative, Notional Amount $ 8,292   $ 8,292       CAD 10,500  
Maturity of Foreign Currency Derivatives     Jul. 02, 2015