Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Components Of Deferred Tax Assets And Liabilities [Line Items]
Federal net operating loss carryforward	$ 129,695	$ 133,454
State net operating loss carryforward	49,551	53,350
Asset impairment charges	14,080	31,137
Stock-based compensation expense	29,196	26,771
Warranty, litigation and other reserves	14,556	18,933
Accrued liabilities	12,166	10,667
Alternative minimum tax and other tax credit carry forwards	10,988	10,296
Inventory, additional costs capitalized for tax purposes	3,930	3,466
Unrealized loss on marketable securities		2,787
Charitable contribution on carryforward	520	942
Deferred revenue	629	580
Total deferred tax assets	265,311	292,383
Valuation allowance	(248,306)	(281,178)
Total deferred tax assets, net of valuation allowance	17,005	11,205
Deferred revenue	3,796	5,589
Property, equipment and other assets	5,753	706
Inventory, additional costs capitalized for financial statement purposes	450	542
Accrued liabilities	758	32
Unrealized gain on marketable securities	1,863
Other, net	4,385	4,336
Total deferred tax liabilities	17,005	11,205
Net deferred tax asset