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Accounts Receivable Accounts Receivable (Tables)
 12 Months Ended
Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]  
Allowance for doubtful accounts and the activity
The following table summarizes the Company’s allowance for doubtful accounts and the activity for 2012, 2011 and 2010 (in thousands):
 
Year Ended December 31,
 
2012
 
2011
 
2010
Allowance for doubtful accounts, beginning of year
$
5,556

 
$
5,104

 
$
1,957

Charges to costs and expenses
2,383

 
1,699

 
1,010

Write-offs of uncollectible accounts, net of recoveries
(1,055
)
 
(973
)
 
(92
)
Business acquisitions and disposals
(351
)
 
(148
)
 
2,330

Currency translation adjustments
41

 
(126
)
 
(101
)
Allowance for doubtful accounts, end of year
$
6,574

 
$
5,556

 
$
5,104