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Per Share Information (Tables) | 12 Months Ended
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Sep. 30, 2023
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
| Year Ended September 30,
| 2023 |  | 2022 |  | 2021
Numerator: |  |  |  |  |
Net income attributable to IES Holdings, Inc. | $ | 108,288 |  |  | $ | 34,762 |  |  | $ | 66,658 |
Increase in noncontrolling interest | (15,701) |  |  | (4,695) |  |  | (315) |
Net income attributable to restricted shareholders of IES Holdings, Inc. | (11) |  |  | (21) |  |  | (56) |
Net income attributable to common shareholders of IES Holdings, Inc. | $ | 92,576 |  |  | $ | 30,046 |  |  | $ | 66,287 |
Denominator: |  |  |  |  |
Weighted average common shares outstanding — basic | 20,196,850 |  |  | 20,667,745 |  |  | 20,790,307 |
Effect of dilutive stock options and non-vested securities | 216,182 |  |  | 226,880 |  |  | 296,125 |
Weighted average common and common equivalent shares outstanding — diluted | 20,413,032 |  |  | 20,894,625 |  |  | 21,086,432 |
Earnings per share attributable to common shareholders of IES Holdings, Inc.: |  |  |  |  |
Basic | $ | 4.58 |  |  | $ | 1.45 |  |  | $ | 3.19 |
Diluted | $ | 4.54 |  |  | $ | 1.44 |  |  | $ | 3.15 |

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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