Per Share Information (Tables)

3 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

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

	Three Months Ended December 31,
	2020		2019
Numerator:
Net income attributable to common stockholders of IES Holdings, Inc.	$	12,204	$	8,337
Increase (decrease) in noncontrolling interest		(118)		45
Net income attributable to restricted stockholders of IES Holdings, Inc.		12		120
Net income attributable to IES Holdings, Inc.	$	12,098	$	8,502
Denominator:
Weighted average common shares outstanding — basic		20,734,516		20,883,477
Effect of dilutive stock options and non-vested securities		326,839		264,835
Weighted average common and common equivalent shares outstanding — diluted		21,061,355		21,148,312
Earnings per share attributable to common shareholders of IES Holdings, Inc.:
Basic	$	0.58	$	0.40
Diluted	$	0.58	$	0.39