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Revenue (Tables) | 9 Months Ended
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Jun. 30, 2021
Revenue from Contract with Customer [Abstract] |
Summary of Contract Asset and Liabilities | Contract assets and liabilities as of June 30, 2021 and September 30, 2020 are summarized below (in thousands):
| June 30, 2021 |  | September 30, 2020
Contract assets | $ | 50,827 |  |  | $ | 50,995 |
Contract liabilities | (43,140) |  |  | (79,445) |
Net contract asset (liability) | $ | 7,687 |  |  | $ | (28,450) |
Disaggregation of Revenue | The following tables present our disaggregated revenue by geographic destination and market sector for the three and nine months ended June 30, 2021 and 2020 (in thousands):
| Three months ended June 30, |  | Nine months ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
United States | $ | 88,412 |  |  | $ | 89,499 |  |  | $ | 256,937 |  |  | $ | 318,009 |
Canada | 16,529 |  |  | 16,970 |  |  | 48,354 |  |  | 46,831 |
Europe, Middle East and Africa | 8,926 |  |  | 6,422 |  |  | 28,120 |  |  | 25,404 |
Asia/Pacific | 1,651 |  |  | 4,643 |  |  | 6,376 |  |  | 11,784 |
Mexico, Central and South America | 295 |  |  | 528 |  |  | 1,318 |  |  | 1,753 |
Total revenues by geographic destination | $ | 115,813 |  |  | $ | 118,062 |  |  | $ | 341,105 |  |  | $ | 403,781 |
| Three months ended June 30, |  | Nine months ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Oil and gas | $ | 49,272 |  |  | $ | 45,851 |  |  | $ | 139,443 |  |  | $ | 157,798 |
Petrochemical | 15,365 |  |  | 29,293 |  |  | 34,725 |  |  | 107,057 |
Electric utility | 26,175 |  |  | 16,725 |  |  | 82,797 |  |  | 63,994 |
Traction power | 13,821 |  |  | 9,122 |  |  | 42,322 |  |  | 31,417 |
All others | 11,180 |  |  | 17,071 |  |  | 41,818 |  |  | 43,515 |
Total revenues by market sector | $ | 115,813 |  |  | $ | 118,062 |  |  | $ | 341,105 |  |  | $ | 403,781 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 + Details
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