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Accounts Receivable (Tables)
12 Months Ended
Dec. 31, 2019
Receivables [Abstract]  
Schedule of Accounts Receivable and Allowance for Doubtful Accounts
At December 31, 2019 and December 31, 2018, accounts receivable (in thousands) consisted of the following:
 
December 31, 
 2019
 
December 31,  
 2018
Trade receivables
$
178,182

 
$
198,435

Less: Allowance for doubtful accounts
(8,984
)
 
(6,751
)
Net trade receivables
169,198

 
191,684

Other receivables(1)
13,040

 
23,802

Total accounts receivable
$
182,238

 
$
215,486

(1
)
At December 31, 2019, other receivables include $8.1 million of refundable alternative minimum tax credits. At December 31, 2018, other receivables included $16.0 million of refundable alternative minimum tax credits that were refunded during the third quarter of 2019.
Changes in our allowance for doubtful accounts (in thousands) during the years ended December 31, 2019 and 2018 were as follows:
 
December 31, 
 2019
 
December 31,  
 2018
Beginning balance
$
6,751

 
$
7,100

Bad debt provision
3,466

 
315

Write-offs
(1,233
)
 
(664
)
Ending balance
$
8,984

 
$
6,751