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Product Warranties (Tables)
9 Months Ended
Sep. 30, 2018
Product Warranties Disclosures [Abstract]  
Summary of Product Warranty Activity
The following table summarizes product warranty accrual activity recorded during the nine months ended September 30, 2018 and 2017.
20182017
Balance at January 1 $47,517 $33,978 
Provision for warranty accrual 19,050 20,284 
Warranty claims (13,827)(11,746)
Foreign currency translation (1,057)2,459 
Balance at September 30 $51,683 $44,975