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ALLOWANCE FOR DOUBTFUL ACCOUNTS (Tables)
9 Months Ended
Sep. 30, 2020
Credit Loss [Abstract]  
Reconciliation of allowance for doubtful accounts
A reconciliation of the beginning and ending balances of the allowance for doubtful accounts is as follows (in thousands):
 
Three Months Ended September 30,
 
Nine Months Ended
September 30,
 
2020
 
2019
 
2020
 
2019
Balance, beginning of the period
$
1,756

 
$
1,676

 
$
1,466

 
$
1,143

Charges to earnings
365

 
583

 
1,314

 
1,865

Write-off of uncollectible accounts receivable
(483
)
 
(441
)
 
(1,152
)
 
(1,202
)
Recoveries collected

 
5

 
10

 
17

Balance, end of the period
$
1,638

 
$
1,823

 
$
1,638

 
$
1,823