Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, Common
Stockholders' Equity Attributable to Parent at Sep. 30, 2021	$ 345,953	$ 220	$ 201,899	$ 173,134	$ (29,300)
Shares, Issued at Sep. 30, 2021		22,049,529			1,316,998
Issuances under compensation plans			(3,638)		$ (3,638)
Issuances under compensation plans, shares					157,167
Acquisition of treasury stock	4,925		0		$ 4,925
Acquisition of treasury stock, shares					(104,200)
Non-cash compensation	(1,898)		(1,898)
Noncontrolling Interest, Change in Redemption Value	(930)			(930)
Net income (loss) attributable to IES Holdings, Inc.	9,052			9,052
Stockholders' Equity Attributable to Parent at Mar. 31, 2022	351,048	$ 220	200,159	181,256	$ (30,587)
Shares, Issued at Mar. 31, 2022		22,049,529			1,264,031
Stockholders' Equity Attributable to Parent at Dec. 31, 2021	356,460	$ 220	199,162	187,538	$ (30,460)
Shares, Issued at Dec. 31, 2021		22,049,529			1,261,444
Acquisition of treasury stock	127		0		$ 127
Acquisition of treasury stock, shares					(2,587)
Non-cash compensation	(997)		(997)
Noncontrolling Interest, Change in Redemption Value	(870)			(870)
Net income (loss) attributable to IES Holdings, Inc.	(5,412)			(5,412)
Stockholders' Equity Attributable to Parent at Mar. 31, 2022	351,048	$ 220	200,159	181,256	$ (30,587)
Shares, Issued at Mar. 31, 2022		22,049,529			1,264,031
Stockholders' Equity Attributable to Parent at Sep. 30, 2022	361,288	$ 220	201,871	203,197	$ (44,000)
Shares, Issued at Sep. 30, 2022		22,049,529			1,707,629
Issuances under compensation plans			(1,843)		$ (1,843)
Issuances under compensation plans, shares					71,013
Acquisition of treasury stock	7,637		(10)		$ 7,647
Acquisition of treasury stock, shares					(243,392)
Options exercised	14		39		$ 53
Options exercised, shares					2,000
Non-cash compensation	(1,959)		(1,959)
Noncontrolling Interest, Change in Redemption Value	(5,826)			(5,826)
Net income (loss) attributable to IES Holdings, Inc.	47,953			47,953
Stockholders' Equity Attributable to Parent at Mar. 31, 2023	397,751	$ 220	201,958	245,324	$ (49,751)
Shares, Issued at Mar. 31, 2023		22,049,529			1,878,008
Stockholders' Equity Attributable to Parent at Dec. 31, 2022	378,051	$ 220	200,940	226,544	$ (49,653)
Shares, Issued at Dec. 31, 2022		22,049,529			1,875,676
Acquisition of treasury stock	148		(3)		$ 151
Acquisition of treasury stock, shares					(4,332)
Options exercised	14		39		$ 53
Options exercised, shares					2,000
Non-cash compensation	(1,054)		(1,054)
Noncontrolling Interest, Change in Redemption Value	(2,771)			(2,771)
Net income (loss) attributable to IES Holdings, Inc.	21,551			21,551
Stockholders' Equity Attributable to Parent at Mar. 31, 2023	$ 397,751	$ 220	$ 201,958	$ 245,324	$ (49,751)
Shares, Issued at Mar. 31, 2023		22,049,529			1,878,008