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REVENUE RECOGNITION AND RECEIVABLES - Allowance for Credit Losses Rollforward - (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
REVENUE RECOGNITION AND RECEIVABLES    
Beginning Balance $ 12,724  
Current period provision for expected losses 3,397 $ 2,736
Write-offs charged against the allowance (4,875)  
Recoveries collected 354  
Ending Balance $ 11,600