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Product Warranty - Reconciliation of Reserve for Warranty Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Guarantees [Abstract]        
Warranty policy term     2 years  
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]        
Beginning balance $ 9,779 $ 10,976 $ 9,636 $ 7,610
Provision 2,137 1,494 5,507 6,492
Provision liability assumed from acquisition 0 0 0 2,208
Claims paid/costs incurred (2,276) (2,349) (5,503) (6,189)
Ending balance $ 9,640 $ 10,121 $ 9,640 $ 10,121