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Revenue (Tables) | 12 Months Ended
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Sep. 30, 2019
Revenue from Contract with Customer [Abstract] |
Contract Assets and Liabilities | Contract assets and liabilities as of September 30, 2019 and September 30, 2018 are summarized below (in thousands):
| September 30,
| 2019 |  | 2018
Contract assets | $ | 55,374 |  |  | $ | 82,545 |
Contract liabilities | (71,464 | ) |  | (43,174 | )
Net contract asset (liability) | $ | (16,090 | ) |  | $ | 39,371 |
Disaggregation of Revenue | The following tables present our disaggregated revenue by geographic destination and market sector for the year ended September 30, 2019 (in thousands):
| 2019
United States | $ | 406,609 |
Canada | 64,326 |
Europe, Middle East and Africa | 32,166 |
Asia/Pacific | 11,405 |
Mexico, Central and South America | 2,674 |
Total revenues by geographic destination | $ | 517,180 |
| 2019
Oil and gas | $ | 242,291 |
Petrochemical | 93,391 |
Electric utility | 84,993 |
Traction power | 26,781 |
All others | 69,724 |
Total revenues by market sector | $ | 517,180 |

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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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