Per Share Information (Tables)

6 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended March 31,
	2022		2021
Numerator:
Net income (loss) attributable to IES Holdings, Inc.	$	(5,412)	$	12,836
Increase in noncontrolling interest		870		621
Net income attributable to restricted stockholders of IES Holdings, Inc.		—		8
Net income (loss) attributable to common stockholders of IES Holdings, Inc.	$	(6,282)	$	12,207
Denominator:
Weighted average common shares outstanding — basic		20,772,426		20,780,006
Effect of dilutive stock options and non-vested securities		0		291,053
Weighted average common and common equivalent shares outstanding — diluted		20,772,426		21,071,059
Earnings (loss) per share attributable to common stockholders of IES Holdings, Inc.:
Basic	$	(0.30)	$	0.59
Diluted	$	(0.30)	$	0.58

	Six Months Ended March 31,
	2022		2021
Numerator:
Net income attributable to IES Holdings, Inc.	$	9,052	$	24,934
Increase in noncontrolling interest		930		503
Net income attributable to restricted stockholders of IES Holdings, Inc.		6		20
Net income attributable to common stockholders of IES Holdings, Inc.	$	8,116	$	24,411
Denominator:
Weighted average common shares outstanding — basic		20,737,253		20,756,879
Effect of dilutive stock options and non-vested securities		402,176		302,209
Weighted average common and common equivalent shares outstanding — diluted		21,139,429		21,059,088
Earnings per share attributable to common stockholders of IES Holdings, Inc.:
Basic	$	0.39	$	1.18
Diluted	$	0.38	$	1.16