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ACCOUNTS RECEIVABLE
12 Months Ended
Dec. 31, 2018
Receivables [Abstract]  
ACCOUNTS RECEIVABLE ACCOUNTS RECEIVABLE

Accounts receivable at December 31, 2018 and 2017, consisted of the following (amounts in thousands):
 
2018
 
2017
Accounts receivable
$
245,236

 
$
229,677

Allowance for doubtful accounts
(3,404
)
 
(2,974
)
Accounts receivable, net
$
241,832

 
$
226,703



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