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Accounts Receivable and Allowance for Doubtful Accounts (Tables) | 9 Months Ended
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Sep. 30, 2021
Receivables [Abstract] |
Schedule of Accounts Receivable | Accounts receivable consists of the following (in thousands):
| September 30, 2021 |  | December 31, 2020
Trade accounts receivable | $ | 213,133 |  |  | $ | 174,604 |
Costs in excess of billings | 53,290 |  |  | 26,915 |
Total accounts receivables | 266,423 |  |  | 201,519 |
Less allowance for doubtful accounts and contract assets | (5,799) |  |  | (3,529) |
Accounts receivable, net | $ | 260,624 |  |  | $ | 197,990 |
The following table provides a roll-forward of the allowance for credit losses, for the nine month period ended September 30, 2021, that is deducted from the amortized cost basis of accounts receivable to present the net amount expected to be collected.
Beginning balance as of January 1, 2021 | $ | 3,529 |
Bad debt expense, net of recoveries | 1,972 |
Accounts written off against allowance and other adjustments | 298 |
Ending balance as of September 30, 2021 | $ | 5,799 |

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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 http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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