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Credit Losses (Tables)
9 Months Ended
Sep. 30, 2020
Credit Loss [Abstract]  
Summary Of Allowance For Credit Losses For Accounts Receivables The following table provides a roll-forward of the allowance for credit losses in 2020 that is deducted from the amortized cost basis of accounts receivable to present the net amount expected to be collected (amounts in thousands):
    
2020
 
Balance at January 1, 2020
   $ (525
Current period change
 for expected credit losses
     (133
  
 
 
 
Balance at March 31, 2020
     (658
Current period change for write-offs
     37  
Current period change for expected credit losses
     83  
  
 
 
 
Balance at June 30, 2020
     (538
Current period change for expected credit losses
     (83
  
 
 
 
Balance at September 30, 2020
   $ (621