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ACCOUNTS RECEIVABLE
 9 Months Ended
Sep. 30, 2017
Receivables [Abstract]  
ACCOUNTS RECEIVABLE ACCOUNTS RECEIVABLE

Accounts receivable consisted of the following as of the dates set forth below (amounts in thousands):
 
September 30,
2017
 
December 31,
2016
Accounts receivable
$
239,095

 
$
182,728

Allowance for doubtful accounts
(2,879
)
 
(3,344
)
Accounts receivable, net
$
236,216

 
$
179,384


Accounts receivable are reduced by an estimated allowance for doubtful accounts which is based on known risks and historical losses.