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Business Combination (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
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Sep. 30, 2013 | Feb. 08, 2013
Business Acquisition Acro [Member] |  |
Business Acquisition [Line Items] |  |
Name of Acquired Business | Acro Group |
Discription of Acquired Business | a group of entities operating under the name of the Acro Group: Residential Renewable Technologies, Inc., Energy Efficiency Solar, Inc. and Lonestar Renewable Technologies Acquisition Corp. (collectively, the “Acro Group”). |
Reason for Business Combination | offering full-service residential solar integration services, including design, procurement, permitting, installation, financing services through third parties and warranty services for residential customers. |
Prexisitng Relationship | IES Residential had previously provided solar installation subcontracting services to the Acro Group |
Date of Acquisition Agreement | Feb. 08, 2013 |
Date of Acquisition | Feb. 15, 2013 |
Receivable Owed By Acro Used In Purchase Price |  | $ 3,800
Business Acquistion Miscor [Member] |  |
Business Acquisition [Line Items] |  |
Name of Acquired Business | MISCOR Group |
Discription of Acquired Business | a provider of maintenance and repair services including engine parts and components to the industrial and rail services. |
Date of Acquisition | Sep. 13, 2013 |
Business Acquisition, Transaction Costs | $ 3,034 |
TaxBasisOfInvestmentsAdditionalInformation | Although this goodwill is not deductible for tax purposes, we acquired tax basis of $8.6 million in goodwill and intangible assets recognized by MISCOR prior to our purchase agreement with them. The deferred tax asset associated with the basis is fully offset by a corresponding valuation allowance. No value was assigned in the purchase price allocation above to the original intangible assets recognized by MISCOR prior to our purchase agreement. |

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- Definition Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition. + References No definition available. + Details
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- Definition Date when the business acquisition agreement was executed, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition With respect to a business combination completed during the period, this element provides a description of the business, other than the name, which may include the industry, size, products and other important information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e845-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Acquisition Date -URI http://asc.fasb.org/extlink&oid=6919109 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e848-128460 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Description of a preexisting relationship between the acquirer and the acquiree, the accounting for the settlement of the preexisting relationship including valuation method used to determine the settlement amount, and the classification of any gain, loss, or expense recognized in the income statement and where such transactions are recognized in the statement of financial position (line item). This information may include disclosure by transaction or group of similar transactions during the preexisting relationship with the acquiree. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition This element represents a description of the primary reason for the business combination which may consist of general categories such as top-line growth, synergistic benefits, market share, and diversification and the more detailed factors that might apply. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Narrative further describing the tax basis of investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 5 -Subparagraph (SX 210.12-13) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611282-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-12) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611133-123010 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Paragraph 8 -Article 12 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12C -Paragraph 11 -Article 12 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 13 -Paragraph 7 -Article 12 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611225-123010 + Details
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