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Revenue (Tables) | 6 Months Ended
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Mar. 31, 2020
Revenue from Contract with Customer [Abstract] |
Summary of Contract Asset and Liabilities | Contract assets and liabilities as of March 31, 2020 and September 30, 2019 are summarized below (in thousands):
| March 31, 2020 |  | September 30, 2019
Contract assets | $ | 61,336 |  |  | $ | 55,374 |
Contract liabilities | (57,821 | ) |  | (71,464 | )
Net contract asset (liability) | $ | 3,515 |  |  | $ | (16,090 | )
Disaggregation of Revenue | The following tables present our disaggregated revenue by geographic destination and market sector for the six months ended March 31, 2020 and 2019 (in thousands):
| Three months ended March 31, |  | Six months ended March 31,
| 2020 |  | 2019 |  | 2020 |  | 2019
United States | $ | 121,432 |  |  | $ | 102,406 |  |  | $ | 228,510 |  |  | $ | 192,304 |
Canada | 15,407 |  |  | 15,094 |  |  | 29,861 |  |  | 24,809 |
Europe, Middle East and Africa | 8,816 |  |  | 5,508 |  |  | 18,982 |  |  | 10,949 |
Asia/Pacific | 5,456 |  |  | 729 |  |  | 7,142 |  |  | 4,473 |
Mexico, Central and South America | 459 |  |  | — |  |  | 1,225 |  |  | 553 |
Total revenues by geographic destination | $ | 151,570 |  |  | $ | 123,737 |  |  | $ | 285,720 |  |  | $ | 233,088 |
| Three months ended March 31, |  | Six months ended March 31,
| 2020 |  | 2019 |  | 2020 |  | 2019
Oil and gas | $ | 51,954 |  |  | $ | 56,022 |  |  | $ | 111,948 |  |  | $ | 105,598 |
Petrochemical | 47,337 |  |  | 22,523 |  |  | 77,763 |  |  | 42,301 |
Electric utility | 24,255 |  |  | 20,383 |  |  | 47,270 |  |  | 39,641 |
Traction power | 13,944 |  |  | 6,025 |  |  | 22,295 |  |  | 11,034 |
All others | 14,080 |  |  | 18,784 |  |  | 26,444 |  |  | 34,514 |
Total revenues by market sector | $ | 151,570 |  |  | $ | 123,737 |  |  | $ | 285,720 |  |  | $ | 233,088 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + 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=118956577&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=118956577&loc=SL49130545-203045 + Details
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