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Revenue Recognition (Tables)

12 Months Ended

Sep. 30, 2023

Revenue Recognition and Deferred Revenue [Abstract]

Disaggregation of Revenue [Table Text Block]


			Year Ended September 30,
			2023						2022						2021
Communications			$	600,776					$	559,777					$	445,968
Residential
Single-family			961,271						825,505						454,449
Multi-family and Other			318,233						305,909						232,898
Total Residential			1,279,504						1,131,414						687,347
Infrastructure Solutions
Industrial Services			46,091						65,686						44,427
Custom Power Solutions			171,262						101,427						102,553
Total Infrastructure Solutions			217,353						167,113						146,980
Commercial & Industrial			279,594						308,504						256,198
Total Revenue			$	2,377,227					$	2,166,808					$	1,536,493


						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


						Year Ended September 30, 2022
									Communications						Residential						Infrastructure Solutions						Commercial & Industrial						Total
Fixed-price									$	367,513					$	1,131,414					$	159,994					$	282,522					$	1,941,443
Time-and-material									192,264						—						7,119						25,982						225,365
Total revenue									$	559,777					$	1,131,414					$	167,113					$	308,504					$	2,166,808

						Year Ended September 30, 2021
									Communications						Residential						Infrastructure Solutions						Commercial & Industrial						Total
Fixed-price									$	327,496					$	687,347					$	139,532					$	243,546					$	1,397,921
Time-and-material									118,472						—						7,448						12,652						138,572
Total revenue									$	445,968					$	687,347					$	146,980					$	256,198					$	1,536,493