Commitments and Contingencies Warranty Account Activity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
WarrantiesActivity [Line Items]
Beginning balance	$ 66,368	$ 62,838	$ 79,536	$ 51,283
New product warranties	1,996	1,512	7,632	5,591
Other changes/adjustments to warranties	(1,552)	26,263	509	40,906
Claims activity	(12,050)	(9,207)	(31,625)	(18,422)
Effect of change in exchange rates	925	(2,374)	(365)	(326)
Ending balance	55,687	79,032	55,687	79,032
Less: current portion of warranty	32,834	50,798	32,834	50,798	52,588
Long-term warranty	$ 22,853	$ 28,234	$ 22,853	$ 28,234