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ACCOUNTS RECEIVABLE (Tables)
 12 Months Ended
Dec. 31, 2015
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Accounts receivable at December 31, 2015 and 2014, consisted of the following (amounts in thousands):
 
2015
 
2014
Accounts receivable
$
181,916

 
$
205,084

Allowance for doubtful accounts
(4,527
)
 
(5,706
)
Accounts receivable, net
$
177,389

 
$
199,378