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Guarantees and Product Warranties (Tables)
 6 Months Ended
Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]  
Changes in warranty liability balance
Changes in the Company’s warranty liability balance are illustrated in the following table:
 
 
2014
 
2013
Balance at January 1
 
$
83,199

 
$
81,751

Current period accruals (1)
 
35,983

 
16,105

Current period settlements
 
(25,184
)
 
(24,429
)
Balance at June 30
 
$
93,998

 
$
73,427

(1) Includes the impact of foreign exchange rate fluctuations.