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Revenue (Tables) | 6 Months Ended
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Mar. 31, 2024
Revenue from Contract with Customer [Abstract] |
Summary of Contract Asset and Liabilities | Contract assets and liabilities as of March 31, 2024 and September 30, 2023 are summarized below (in thousands):
| March 31, 2024 |  | September 30, 2023
Contract assets | $ | 75,010 |  |  | $ | 60,621 |
Contract liabilities | (315,699) |  |  | (279,796) |
Net contract liability | $ | (240,689) |  |  | $ | (219,175) |
Disaggregation of Revenue | The following tables present our disaggregated revenue by geographic destination and market sector for the three and six months ended March 31, 2024 and 2023 (in thousands):
| Three months ended March 31, |  | Six months ended March 31,
| 2024 |  | 2023 |  | 2024 |  | 2023
United States | $ | 216,933 |  |  | $ | 134,161 |  |  | $ | 376,793 |  |  | $ | 234,273 |
Canada | 24,160 |  |  | 21,995 |  |  | 44,510 |  |  | 40,491 |
Europe | 8,265 |  |  | 7,953 |  |  | 14,797 |  |  | 12,087 |
Middle East and Africa | 2,803 |  |  | 4,004 |  |  | 6,078 |  |  | 6,429 |
Mexico, Central and South America | 2,159 |  |  | 1,543 |  |  | 4,816 |  |  | 2,458 |
Asia/Pacific | 788 |  |  | 1,788 |  |  | 2,131 |  |  | 2,564 |
Total revenues by geographic destination | $ | 255,108 |  |  | $ | 171,444 |  |  | $ | 449,125 |  |  | $ | 298,302 |
| Three months ended March 31, |  | Six months ended March 31,
| 2024 |  | 2023 |  | 2024 |  | 2023
Oil and gas (excludes petrochemical) | $ | 103,820 |  |  | $ | 62,597 |  |  | $ | 187,456 |  |  | $ | 106,107 |
Petrochemical | 50,070 |  |  | 25,887 |  |  | 78,437 |  |  | 48,377 |
Electric utility | 47,502 |  |  | 42,668 |  |  | 88,205 |  |  | 71,075 |
Commercial and other industrial | 34,894 |  |  | 22,270 |  |  | 59,566 |  |  | 39,320 |
Light rail traction power | 4,517 |  |  | 7,317 |  |  | 8,862 |  |  | 14,389 |
All others | 14,305 |  |  | 10,705 |  |  | 26,599 |  |  | 19,034 |
Total revenues by market sector | $ | 255,108 |  |  | $ | 171,444 |  |  | $ | 449,125 |  |  | $ | 298,302 |

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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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