Schedule II - Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Warranty Reserve [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 30,754	$ 34,999	$ 37,692
Additions (Reductions) Charged to Cost and Expenses	979	1,104	4,268
Deductions	(6,239)	(5,349)	(6,961)
Balance at End of Period	25,494	30,754	34,999
Valuation Allowance of Deferred Tax Assets [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	3,015	3,096	4,061
Deductions	(27)	(81)	(965)
Balance at End of Period	$ 2,988	$ 3,015	$ 3,096