Revenue Recognition (Tables)

9 Months Ended

Jun. 30, 2022

Revenue Recognition and Deferred Revenue [Abstract]

Disaggregation of Revenue [Table Text Block]

	Three Months Ended June 30,				Nine Months Ended June 30,
	2022		2021		2022		2021
Communications	$	144,748	$	116,218	$	402,776	$	309,460
Residential
Single-family	224,556		102,105		590,453		274,707
Multi-family and Other	77,207		84,344		213,492		181,569
Total Residential	301,763		186,449		803,945		456,276
Infrastructure Solutions
Industrial Services	15,317		11,972		45,970		32,560
Custom Power Solutions	24,520		27,145		77,696		75,674
Total Infrastructure Solutions	39,837		39,117		123,666		108,234
Commercial & Industrial	80,953		64,087		$	219,016	$	178,700
Total Revenue	$	567,301	$	405,871	$	1,549,403	$	1,052,670

	Three Months Ended June 30, 2022
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Total
Fixed-price		$	94,109	$	301,763	$	38,126	$	75,779	$	509,777
Time-and-material			50,639		—		1,711		5,174		57,524
Total revenue		$	144,748	$	301,763	$	39,837	$	80,953	$	567,301
	Three Months Ended June 30, 2021
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Total
Fixed-price		$	81,521	$	186,449	$	37,241	$	60,444	$	365,655
Time-and-material			34,697		—		1,876		3,643		40,216
Total revenue		$	116,218	$	186,449	$	39,117	$	64,087	$	405,871

	Nine Months Ended June 30, 2022
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Total
Fixed-price		$	268,253	$	803,945	$	118,503	$	204,985	$	1,395,686
Time-and-material			134,523		—		5,163		14,031		153,717
Total revenue		$	402,776	$	803,945	$	123,666	$	219,016	$	1,549,403
	Nine Months Ended June 30, 2021
		Communications		Residential		Infrastructure Solutions		Commercial & Industrial		Total
Fixed-price		$	226,086	$	456,276	$	102,864	$	170,134	$	955,360
Time-and-material			83,374		—		5,370		8,566		97,310
Total revenue		$	309,460	$	456,276	$	108,234	$	178,700	$	1,052,670