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Restructuring Charges (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Company's accrual for restructuring activities:-        
Beginning Restructuring Accrual Balance, as of December 31, 2016     $ 9,531  
Restructuring Charges $ 3,385 $ 1,494 8,840 $ 4,579
Restructuring Cash Payments     (7,701)  
Impact of foreign currency on restructuring reserve     837  
Ending Restructuring Accrual Balance, as of September 30, 2017 $ 11,507   $ 11,507