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Per Share Information (Tables) | 12 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
| Year Ended September 30,
| 2021 |  | 2020 |  | 2019
Numerator: |  |  |  |  |
Net income attributable to IES Holdings, Inc. | $ | 66,658 |  |  | $ | 41,599 |  |  | $ | 33,206 |
Increase in noncontrolling interest | (315) |  |  | (194) |  |  | — |
Net income attributable to restricted shareholders of IES Holdings, Inc. | (56) |  |  | (575) |  |  | (256) |
Net income attributable to common shareholders of IES Holdings, Inc. | $ | 66,287 |  |  | $ | 40,830 |  |  | $ | 32,950 |
Denominator: |  |  |  |  |
Weighted average common shares outstanding — basic | 20,790,307 |  |  | 20,795,892 |  |  | 21,082,012 |
Effect of dilutive stock options and non-vested securities | 296,125 |  |  | 296,518 |  |  | 233,233 |
Weighted average common and common equivalent shares outstanding — diluted | 21,086,432 |  |  | 21,092,410 |  |  | 21,315,245 |
Earnings per share attributable to common shareholders of IES Holdings, Inc.: |  |  |  |  |
Basic | $ | 3.19 |  |  | $ | 1.96 |  |  | $ | 1.56 |
Diluted | $ | 3.15 |  |  | $ | 1.94 |  |  | $ | 1.55 |

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- References No definition available. + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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