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ACCOUNTS RECEIVABLE (Tables)
6 Months Ended
Jun. 30, 2021
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Accounts receivable consisted of the following (amounts in thousands):
 June 30,
2021
December 31,
2020
Accounts receivable$269,623 $196,796 
Allowance for doubtful accounts(3,894)(3,782)
Accounts receivable, net$265,729 $193,014