Commitments and Contingencies Warranty Account Activity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Warranty Activity [Line Items]
Beginning balance	$ 50,754	$ 77,251	$ 53,605	$ 79,536
New product warranties	1,961	3,507	2,822	5,636
Other changes/adjustments to warranties	3,611	(3,770)	5,638	2,061
Claims activity	(5,289)	(8,255)	(10,388)	(19,575)
Effect of change in exchange rates	(405)	(2,365)	(1,045)	(1,290)
Ending balance	50,632	66,368	50,632	66,368
Less: current portion of warranty	24,709	42,861	24,709	42,861
Long-term warranty	$ 25,923	$ 23,507	$ 25,923	$ 23,507