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Revenue Recognition (Tables)

12 Months Ended

Sep. 30, 2025

Revenue Recognition and Deferred Revenue [Abstract]

Disaggregation of Revenue [Table Text Block]

			Year Ended September 30,
			2025						2024						2023
Communications			$	1,140,640					$	776,474					$	600,776
Residential
Single-family Electrical			665,610						732,334						717,386
Single-family Plumbing & HVAC			325,798						324,911						243,885
Multi-family and Other			312,961						331,595						318,233
Total Residential			1,304,369						1,388,840						1,279,504
Infrastructure Solutions
Industrial Services			98,262						53,291						46,091
Custom Engineered Solutions			400,462						297,805						171,262
Total Infrastructure Solutions			498,724						351,096						217,353
Commercial & Industrial			427,735						367,948						279,594
Total revenue			$	3,371,468					$	2,884,358					$	2,377,227

						Year Ended September 30, 2025
									Communications						Residential						Infrastructure Solutions						Commercial & Industrial						Total
Fixed-price									$	803,930					$	1,304,369					$	457,587					$	372,093					$	2,937,979
Time-and-material									336,710						—						41,137						55,642						433,489
Total revenue									$	1,140,640					$	1,304,369					$	498,724					$	427,735					$	3,371,468
						Year Ended September 30, 2024
									Communications						Residential						Infrastructure Solutions						Commercial & Industrial						Total
Fixed-price									$	554,160					$	1,388,840					$	336,786					$	316,365					$	2,596,151
Time-and-material									222,314						—						14,310						51,583						288,207
Total revenue									$	776,474					$	1,388,840					$	351,096					$	367,948					$	2,884,358
						Year Ended September 30, 2023
									Communications						Residential						Infrastructure Solutions						Commercial & Industrial						Total
Fixed-price									$	404,684					$	1,279,504					$	210,547					$	241,159					$	2,135,894
Time-and-material									196,092						—						6,806						38,435						241,333
Total revenue									$	600,776					$	1,279,504					$	217,353					$	279,594					$	2,377,227

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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
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-5

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- References

No definition available.

+ Details

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