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Discontinued Operations and Disposal Groups	3 Months Ended
	Dec. 31, 2023
Discontinued Operations and Disposal Groups [Abstract]
Business Combination Disclosure [Text Block]	13. BUSINESS COMBINATIONS AND DIVESTITURES We completed no acquisitions during the three months ended December 31, 2023 or during the year ended September 30, 2023. On October 7, 2022, we sold 100% of the membership interests of STR Mechanical, LLC and its subsidiary Technical Services II, LLC (collectively, “STR”). As a result, we recognized a pre-tax gain of $13,045, which was included in “Gain on sale of assets” within our Condensed Consolidated Statements of Comprehensive Income for the three months ended December 31, 2022.

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- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-5

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-Topic 805
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//805/tableOfContent

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- References

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