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TRADE RECEIVABLES (Tables)
12 Months Ended
Dec. 31, 2020
Receivables [Abstract]  
TRADE RECEIVABLES
At December 31,  2020   2019 
(in thousands)        
Gross trade receivables  $143,191   $139,465 
Allowance for expected credit losses   (16,854)   (16,699)
Net trade receivables  $126,337   $122,766