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Debt - Loan Contract (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2016
EUR (€)
Mar. 31, 2016
USD ($)
Mar. 23, 2016
EUR (€)
Oct. 01, 2017
USD ($)
Oct. 02, 2016
USD ($)
Debt          
Proceeds from debt issuance | $       $ 27,073 $ 32,112
AFT Hungary | Loan Contract | Erste Bank Hungary          
Debt          
Loan amount     € 4,000,000    
Proceeds from debt issuance € 4,000,000        
Interest rate (as a percent)     0.98%    
Semi-annual payment of debt     € 400,000    
Frequency of payments     semi-annual    
AFT Hungary | Loan Contract | Erste Bank Hungary | Amended & Restated Credit Agreement          
Debt          
Repayment of debt obligations | $   $ 3,000