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ACCOUNTS RECEIVABLE (Tables)
 12 Months Ended
Dec. 31, 2018
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] 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