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Accounts Receivable
 12 Months Ended
Dec. 31, 2014
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 2014, 2013 and 2012 (in thousands):
 
Year Ended December 31,
 
2014
 
2013
 
2012
Allowance for doubtful accounts, beginning of year
$
7,674

 
$
6,574

 
$
5,556

Charges to costs and expenses
1,723

 
1,571

 
2,383

Write-offs of uncollectible accounts, net of recoveries
(961
)
 
(505
)
 
(1,055
)
Business acquisitions and disposals
—

 
—

 
(351
)
Currency translation adjustments
(422
)
 
34

 
41

Allowance for doubtful accounts, end of year
$
8,014

 
$
7,674

 
$
6,574