Per Share Information (Tables)

12 Months Ended

Sep. 30, 2017

Per Share Information [Abstract]

ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock

	Years Ended September 30,
	2017		2016		2015
Numerator:
Net income from continuing operations attributable to common shareholders of IES Holdings, Inc.	$	13,275	$	119,722	$	16,792
Increase in noncontrolling interest		44
Net income from continuing operations attributable to restricted shareholders of IES Holdings, Inc.		103		1,056		85
Net income from continuing operations of IES Holdings, Inc.	$	13,422	$	120,778	$	16,877
Net loss from discontinued operations attributable to common shareholders of IES Holdings, Inc.	$	-	$	-	$	(339)
Net loss from discontinued operations of IES Holdings, Inc.	$	-	$	-	$	(339)
Net income attributable to common shareholders	$	13,275	$	119,722	$	16,453
Increase in noncontrolling interest		44
Net income attributable to restricted shareholders		103		1,056		85
Net income of IES Holdings, Inc.	$	13,422	$	120,778	$	16,538
Denominator:
Weighted average common shares outstanding — basic		21,280,549		21,279,342		21,480,622
Effect of dilutive stock options and non-vested restricted stock		252,705		212,997		45,566
Weighted average common and common equivalent shares outstanding — diluted		21,533,254		21,492,339		21,526,188
Basic earnings (loss) per share attributable to IES Holdings, Inc.:
Basic earnings per share from continuing operations	$	0.62	$	5.63	$	0.79
Basic loss per share from discontinued operations	$	0.00	$	0.00	$	(0.02)
Basic earnings per share	$	0.62	$	5.63	$	0.77
Diluted earnings per share attributable to IES Holdings, Inc.:
Diluted earnings per share from continuing operations	$	0.62	$	5.62	$	0.79
Diluted loss per share from discontinued operations	$	0.00	$	0.00	$	(0.02)
Diluted earnings per share	$	0.62	$	5.62	$	0.77