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Accounts Receivable
 12 Months Ended
Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]  
Accounts Receivable
Accounts Receivable
Accounts receivable are net of an allowance for doubtful accounts. The following table summarizes the Company’s allowance for doubtful accounts and the activity for 2013, 2012 and 2011 (in thousands):
 
Year Ended December 31,
 
2013
 
2012
 
2011
Allowance for doubtful accounts, beginning of year
$
6,574

 
$
5,556

 
$
5,104

Charges to costs and expenses
1,571

 
2,383

 
1,699

Write-offs of uncollectible accounts, net of recoveries
(505
)
 
(1,055
)
 
(973
)
Business acquisitions and disposals
—

 
(351
)
 
(148
)
Currency translation adjustments
34

 
41

 
(126
)
Allowance for doubtful accounts, end of year
$
7,674

 
$
6,574

 
$
5,556