Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Net operating losses	$ 483	$ 9,962
Warranty reserve	16,085	11,406
Stock-based compensation	2,383	2,654
Accruals not currently deductible and other	6,210	8,193
Inventories	3,843	5,008
State tax credit carryforwards	3,714	4,105
Gross deferred tax assets, before valuation allowance	32,718	41,328
Valuation allowance	(4,201)	(24,131)
Gross deferred tax assets, after valuation allowance	28,517	17,197
Deferred tax liabilities:
Depreciation and other	(19,380)	(20,758)
Gross deferred tax liabilities	(19,380)	(20,758)
Net deferred tax asset (liability)	$ 9,137	$ (3,561)