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Commitments and Contingencies - Summary of Warranty Provision (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]  
Balance - Beginning of the year $ 3,490
Provision for new warranty claims 852
Change in provision for preexisting warranty claims (322)
Deduction for payments made (495)
Currency translation adjustment 27
Balance - End of period $ 3,552