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Guarantees and Product Warranties (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Changes in warranty liability balance    
Balance at January 1 $ 63,355 $ 78,313
Current period accruals 74,015 [1] 49,825 [1]
Current period settlements (55,619) (64,783)
Balance at December 31 81,751 63,355
Guarantees and Product Warranties (Textuals)    
Carrying value of the bonds 11,900 11,900
Maximum future payment obligations 80,662 71,321
Standby letters of credit 23,435 22,623
Liability associated with Standby letters of credit $ 0 $ 0
[1] Includes the impact of foreign exchange rate fluctuations.