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Discontinued Operations and Disposal Groups	6 Months Ended
Discontinued Operations and Disposal Groups	Mar. 31, 2024
Discontinued Operations and Disposal Groups [Abstract]
Business Combination Disclosure [Text Block]	13. BUSINESS COMBINATIONS AND DIVESTITURES We completed no acquisitions during the six months ended March 31, 2024 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 six months ended March 31, 2023.