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Revenue (Tables) | 12 Months Ended
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Sep. 30, 2023
Revenue from Contract with Customer [Abstract] |
Contract Assets and Liabilities | Contract assets and liabilities as of September 30, 2023 and September 30, 2022 are summarized below (in thousands):
| September 30,
| 2023 |  | 2022
Contract assets | $ | 60,621 |  |  | $ | 88,351 |
Contract liabilities | (279,796) |  |  | (79,857) |
Net contract asset (liability) | $ | (219,175) |  |  | $ | 8,494 |
Disaggregation of Revenue | The following tables present our disaggregated revenue by geographic destination and market sector for the years ended September 30, 2023, 2022 and 2021 (in thousands):
| 2023 |  | 2022 |  | 2021
United States | $ | 557,934 |  |  | $ | 404,973 |  |  | $ | 351,422 |
Canada | 84,090 |  |  | 81,218 |  |  | 68,655 |
Middle East and Africa | 14,998 |  |  | 20,712 |  |  | 26,615 |
Asia/Pacific | 6,188 |  |  | 4,885 |  |  | 8,889 |
Europe | 26,699 |  |  | 17,699 |  |  | 13,027 |
Mexico, Central and South America | 9,399 |  |  | 3,095 |  |  | 1,951 |
Total revenues by geographic destination | $ | 699,308 |  |  | $ | 532,582 |  |  | $ | 470,559 |
| 2023 |  | 2022 |  | 2021
Oil and gas (excludes petrochemical) | $ | 273,117 |  |  | $ | 215,235 |  |  | $ | 187,660 |
Petrochemical | 94,188 |  |  | 66,538 |  |  | 58,986 |
Electric utility | 158,400 |  |  | 122,361 |  |  | 111,244 |
Traction power | 28,112 |  |  | 44,930 |  |  | 59,106 |
Commercial and other industrial | 103,966 |  |  | 56,448 |  |  | 27,065 |
All others | 41,525 |  |  | 27,070 |  |  | 26,498 |
Total revenues by market sector | $ | 699,308 |  |  | $ | 532,582 |  |  | $ | 470,559 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 + Details
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