Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Revenues	$ 192,178	$ 150,766
Cost of services	156,996	123,133
Gross profit	35,182	27,633
Selling, general and administrative expenses	28,194	22,511
Contingent Consideration Expense	0	0
Loss (gain) on sale of assets	(7)	1
Income from operations	6,995	5,121
Interest and other (income) expense:
Interest expense	446	293
Other (income) expense, net	(4)	(29)
Income from operations before income taxes	6,553	4,857
Provision (benefit) for income taxes	2,629	(942)
Net Income	3,924	5,799
Net income attributable to noncontrolling interest	52	0
Net income attirbutable to IES Holding, Inc.	$ 3,872	$ 5,799
Earnings per share attributable to IES Holdings, Inc.:
Earnings Per Share, Basic	$ 0.18	$ 0.27
Earnings Per Share, Diluted	$ 0.18	$ 0.27
Shares used in the computation of earnings (loss) per share
Basic	21,286,090	21,269,543
Diluted	21,557,838	21,347,494