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ACCOUNTS RECEIVABLE (Tables)
6 Months Ended
Jun. 30, 2019
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

Accounts receivable consisted of the following as of the dates set forth below (amounts in thousands):
 
June 30,
2019
 
December 31,
2018
Accounts receivable
$
275,508

 
$
245,236

Allowance for doubtful accounts
(3,502
)
 
(3,404
)
Accounts receivable, net
$
272,006

 
$
241,832