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ALLOWANCE FOR CREDIT LOSSES (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at beginning of period $ 22,151  
Credit loss expense (recovery) (935)  
Write-off / adjustments (2,573)  
Balance at end of period 18,643  
Unbilled receivables 48,400 $ 51,400
Allowance for credit loss, contract assets $ 600 $ 400