Summary of Significant Accounting Policies Consolidated Statement of Cash Flow Restatement (Details) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Net income	$ (455,526)	$ 78,200
Deferred taxes, net	(1,410)	(1,237)
Accounts receivable	(21,940)	(53,425)
Unearned revenue	22,862	(2,814)
Warranty	28,028	16,535
As previously reported [Member]
Net income		82,795
Deferred taxes, net		711
Accounts receivable		(53,770)
Unearned revenue		(8,564)
Warranty		16,087
As restated [Member]
Net income		78,200
Deferred taxes, net		(1,237)
Accounts receivable		(53,425)
Unearned revenue		(2,814)
Warranty		$ 16,535