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Guarantees and Product Warranties (Tables)
 6 Months Ended
Jun. 30, 2013
Commitments and Contingencies Disclosure [Abstract]  
Changes in warranty liability balance
Changes in the Company’s warranty liability balance are illustrated in the following table:
 
 
2013
 
2012
Balance at January 1
 
$
81,751

 
$
63,355

Current period accruals (a)
 
16,105

 
29,867

Current period settlements
 
(24,429
)
 
(26,371
)
Balance at June 30
 
$
73,427

 
$
66,851

(a)
includes the impact of foreign exchange rate fluctuations