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Basis of Presentation and Significant Accounting Policies - Summary of Changes in Carrying Amount of Accrued Warranty Expense (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Movement in Product Warranty Accrual [Roll Forward]    
Balance at beginning of period $ 13,428 $ 11,477
Additions 810 667
Expirations and other changes (709) (84)
Payments (347) (16)
Translation (360) 173
Balance at end of period $ 12,822 $ 12,217