Commitments and Contingencies Warranty Account Activity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
WarrantiesActivity [Line Items]
Beginning balance	$ 77,251	$ 59,163	$ 79,536	$ 51,283
New product warranties	3,507	2,196	5,636	4,079
Other changes/adjustments to warranties	(3,770)	5,631	2,061	14,643
Claims activity	(8,255)	(4,768)	(19,575)	(9,215)
Effect of change in exchange rates	(2,365)	616	(1,290)	2,048
Ending balance	66,368	62,838	66,368	62,838
Less: current portion of warranty	42,861	29,999	42,861	29,999	52,588
Long-term warranty	$ 23,507	$ 32,839	$ 23,507	$ 32,839