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Accounts Receivable, Net (Tables) | 9 Months Ended
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Sep. 30, 2022
Receivables [Abstract] |
Schedule of Accounts Receivable, Net | Accounts receivable, net, at September 30, 2022 and December 31, 2021 was as follows (in thousands):
| September 30, 2022 |  | December 31, 2021
Trade accounts receivable | $ | 252,251 |  |  | $ | 190,710 |
Unbilled revenue, at net realizable value | 167,083 |  |  | 67,616 |
Total accounts receivable | 419,334 |  |  | 258,326 |
Allowance for doubtful accounts | (20,364) |  |  | (16,158) |
Accounts receivable, net | $ | 398,970 |  |  | $ | 242,168 |
Schedule of Changes in the Allowance for Doubtful Accounts on Accounts Receivable | Changes to the allowance for doubtful accounts for the nine months ended September 30, 2022 and twelve months ended December 31, 2021 are as follows (in thousands):
| September 30, 2022 |  | December 31, 2021
Balance at beginning of period | $ | (16,158) |  |  | $ | (14,894) |
Provision | (9,796) |  |  | (9,422) |
Charge-offs, net of recoveries | 5,590 |  |  | 8,158 |
Allowance for doubtful accounts | $ | (20,364) |  |  | $ | (16,158) |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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