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Accounts Receivable, Net (Tables)
3 Months Ended
Mar. 31, 2023
Receivables [Abstract]  
Schedule of Accounts Receivable, Net
Accounts receivable, net, at March 31, 2023 and December 31, 2022 was as follows (in thousands):

March 31,
2023
December 31,
2022
Trade accounts receivable$285,876 $267,409 
Unbilled revenue, at net realizable value178,811 87,890 
Total accounts receivable464,687 355,299 
Allowance for doubtful accounts(21,906)(20,801)
Accounts receivable, net$442,781 $334,498 
Schedule of Changes in the Allowance for Doubtful Accounts on Accounts Receivable
Changes to the allowance for doubtful accounts for the three months ended March 31, 2023 and twelve months ended December 31, 2022 were as follows (in thousands):
March 31,
2023
December 31,
2022
Balance at beginning of period$(20,801)$(16,158)
Provision(2,055)(13,545)
Charge-offs, net of recoveries950 8,902 
Allowance for doubtful accounts$(21,906)$(20,801)