Schedule II - Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Warranty Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 33,841	$ 40,812	$ 28,987
Additions (Reductions) Charged to Cost and Expenses	8,515	3,774	20,000
Deductions	(8,834)	(10,745)	(8,175)
Balance at End of Period	33,522	33,841	40,812
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	4,465	4,201	24,131
Additions (Reductions) Charged to Cost and Expenses	117	388
Deductions		(124)	(19,930)
Balance at End of Period	$ 4,582	$ 4,465	$ 4,201