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Accounts Receivable, Contract Assets, and Contract Liabilities (Tables) | 12 Months Ended
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Jan. 28, 2023
Receivables [Abstract] |
Schedule of Accounts Receivable | Accounts receivable, net classified as current, consisted of the following (dollars in thousands):
| January 28, 2023 |  | January 29, 2022
Trade accounts receivable | $ | 367,842 |  |  | $ | 330,811 |
Unbilled accounts receivable | 670,066 |  |  | 545,493 |
Retainage | 32,351 |  |  | 20,318 |
Total | 1,070,259 |  |  | 896,622 |
Less: allowance for doubtful accounts | (3,246) |  |  | (724) |
Accounts receivable, net | $ | 1,067,013 |  |  | $ | 895,898 |
The allowance for doubtful accounts changed as follows (dollars in thousands):
| January 28, 2023 |  | January 29, 2022
Allowance for doubtful accounts at beginning of period | $ | 724 |  |  | $ | 1,676 |
Provision for bad debt | 2,600 |  |  | 2,911 |
Amounts charged against the allowance | (78) |  |  | (3,863) |
Allowance for doubtful accounts at end of period | $ | 3,246 |  |  | $ | 724 |
Contract with Customer, Asset and Liability | Net contract assets consisted of the following (dollars in thousands):
| January 28, 2023 |  | January 29, 2022
Contract assets | $ | 43,932 |  |  | $ | 24,539 |
Contract liabilities | 19,512 |  |  | 18,512 |
Contract assets, net | $ | 24,420 |  |  | $ | 6,027 |
Customer Credit Concentration | Customers whose combined amounts of accounts receivable and contract assets, net exceeded 10% of total combined accounts receivable and contract assets, net as of January 28, 2023 or January 29, 2022 were as follows (dollars in millions):
| January 28, 2023 |  | January 29, 2022
| Amount |  | % of Total |  | Amount |  | % of Total
Lumen Technologies | $ | 189.3 |  |  | 17.4 | % |  | $ | 166.0 |  |  | 18.4 | %
AT&T Inc. | $ | 136.2 |  |  | 12.5 | % |  | $ | 106.0 |  |  | 11.7 | %
Comcast Corporation | $ | 125.2 |  |  | 11.5 | % |  | $ | 113.5 |  |  | 12.6 | %
Verizon Communications Inc. | $ | 102.7 |  |  | 9.4 | % |  | $ | 144.3 |  |  | 16.0 | %
Customers whose contract revenues exceeded 10% of total contract revenues during fiscal 2023, fiscal 2022, and fiscal 2021, as well as total contract revenues from all other customers combined, were as follows:
| Fiscal Year Ended
| January 28, 2023 |  | January 29, 2022 |  | January 30, 2021
| Amount | % of Total |  | Amount | % of Total |  | Amount | % of Total
AT&T Inc. | $ | 958.0 |  | 25.2 | % |  | $ | 735.2 |  | 23.5 | % |  | $ | 533.7 |  | 16.7 | %
Lumen Technologies | 483.5 |  | 12.7 | % |  | 373.0 |  | 11.9 | % |  | 542.0 |  | 16.9 | %
Comcast Corporation | 430.6 |  | 11.3 | % |  | 473.8 |  | 15.1 | % |  | 533.9 |  | 16.7 | %
Verizon Communications Inc. | 347.3 |  | 9.1 | % |  | 352.6 |  | 11.3 | % |  | 601.6 |  | 18.8 | %
Total other customers combined | 1,589.1 |  | 41.7 | % |  | 1,195.9 |  | 38.2 | % |  | 988.0 |  | 30.9 | %
Total contract revenues | $ | 3,808.5 |  | 100.0% |  | $ | 3,130.5 |  | 100.0% |  | $3,199.2 | 100.0%
Total contract revenues by customer type during fiscal 2023, fiscal 2022, and fiscal 2021, were as follows (dollars in millions):
| Fiscal Year Ended
| January 28, 2023 |  | January 29, 2022 |  | January 30, 2021
| Amount | % of Total |  | Amount | % of Total |  | Amount | % of Total
Telecommunications | $ | 3,415.8 |  | 89.7% |  | $ | 2,777.6 |  | 88.7% |  | $ | 2,851.6 |  | 89.1%
Underground facility locating | 274.9 |  | 7.2% |  | 255.4 |  | 8.2% |  | 229.6 |  | 7.2%
Electrical and gas utilities and other | 117.8 |  | 3.1% |  | 97.5 |  | 3.1% |  | 118.0 |  | 3.7%
Total contract revenues | $ | 3,808.5 |  | 100.0% |  | $ | 3,130.5 |  | 100.0% |  | $ | 3,199.2 |  | 100.0%

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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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