Quarterly report pursuant to Section 13 or 15(d)

Reserve for Product Warranties - Schedule of Warranty Reserve (Details)

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Reserve for Product Warranties - Schedule of Warranty Reserve (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Reserve for Product Warranties        
Balance, beginning of period $ 10,913 $ 14,139 $ 10,995 $ 10,670
Assumed through acquisitions 0 722 0 1,888
Additions charged to expense 792 1,984 3,127 9,437
Reductions (945) (3,616) (2,003) (7,977)
Changes in estimate related to product remediation activities (1,695) (796) (3,054) (1,585)
Balance, end of period $ 9,065 $ 12,433 $ 9,065 $ 12,433