Allowance for Doubtful Accounts (Tables)

9 Months Ended

Sep. 30, 2013

Receivables [Abstract]

Summary of Allowance for Doubtful Accounts

The activity of the allowance for doubtful accounts for the nine months ended September 30, 2013 is as follows:

Balance at December 31, 2012	$	4,798
Provision charged to income		998
Write-offs		(739	)
Currency		(89	)
Balance at September 30, 2013	$	4,968