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Warranty Accrual Included in Other Accrued Liabilities (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Product Warranty Liability [Line Items]      
Balance at beginning of period $ 8,996 $ 7,909 $ 8,200
Acquisition   14 41
Accruals for warranties issued during the period 28,490 14,106 13,045
Accruals related to pre-existing warranties 821 4,026 921
Settlements made during the period (21,674) (17,059) (14,298)
Balance at end of period $ 16,633 $ 8,996 $ 7,909