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ACCOUNTS RECEIVABLE
 12 Months Ended
Dec. 31, 2017
Receivables [Abstract]  
ACCOUNTS RECEIVABLE
ACCOUNTS RECEIVABLE
The following table summarizes the accounts receivables, net of allowances:
 
 
December 31,
 
 
2017
 
2016
Accounts receivable
 
$
52,820

 
$
48,664

Allowances
 
(2,346
)
 
(2,234
)
Accounts receivable, net
 
$
50,474

 
$
46,430

The following table summarizes a rollforward of the accounts receivable allowances for the years ended December 31, 2017, 2016 and 2015:
 
 
December 31,
 
 
2017
 
2016
 
2015
Beginning
 
$
(2,234
)
 
$
(2,437
)
 
$
(2,494
)
Additions
 
(418
)
 
—

 
(235
)
Write-offs
 
306

 
203

 
292

Ending
 
$
(2,346
)
 
$
(2,234
)
 
$
(2,437
)