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Commitments and Contingencies - Summary of Warranty Provision (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2017
USD ($)
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]  
Balance - Beginning of the year $ 5,552
Provision for new warranty claims 1,006
Change in provision for preexisting warranty claims 98
Deduction for payments made (2,012)
Currency translation adjustment 60
Balance - End of period $ 4,704