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Guarantees and Product Warranties (Tables)
 6 Months Ended
Jun. 30, 2012
Commitments and Contingencies Disclosure [Abstract]  
Changes in warranty liability balance
Changes in the Company’s warranty liability balance are illustrated in the following table:
 
 
2012
 
2011
Balance at January 1
 
$
63,355

 
$
78,313

Current period accruals (a)
 
29,867

 
30,066

Current period settlements
 
(26,371
)
 
(34,058
)
Balance at June 30
 
$
66,851

 
$
74,321

(a)
includes the impact of foreign exchange rate fluctuations