Warranty Accrual Included in Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Product Warranty Liability [Line Items]
Balance at beginning of period	$ 7,909	$ 8,200	$ 7,203
Acquisition	14	41
Accruals for warranties issued during the period	14,106	13,045	14,223
Accruals related to pre-existing warranties	4,026	921	(379)
Settlements made during the period	(17,059)	(14,298)	(12,847)
Balance at end of period	$ 8,996	$ 7,909	$ 8,200