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Guarantees and Product Warranties (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Changes in warranty liability balance    
Balance at January 1 $ 78,313 $ 62,673
Current period accruals 49,825 [1] 77,490 [1]
Current period settlements (64,783) (61,850)
Balance at December 31 63,355 78,313
Guarantees and Product Warranties (Textuals)    
Carrying value of the bonds 11,900 11,900
Maximum future payment obligations 71,321 74,629
Standby letters of credit 22,623 23,202
Liability associated with Standby letters of credit $ 0 $ 0
[1] Includes the impact of foreign exchange rate fluctuations.