Subsequent Event (Details) - Subsequent Event [Member]	Nov. 20, 2015	Oct. 30, 2015	Oct. 02, 2015
Phantom Share Units PSU's Employees [Member]
Subsequent Event [Line Items]
Subsequent Event Description			the Company awarded certain officers, including each of its named executive officers, and key employees performance-based phantom stock units pursuant to the terms and conditions of the Integrated Electrical Services, Inc. Amended and Restated 2006 Equity Incentive Plan.
Business Acquisition Calumet [Member]
Subsequent Event [Line Items]
Subsequent Event Description		a subsidiary of our Infrastructure Solutions segment acquired all of the membership interests of Calumet Armature & Electric, LLC (“Calumet”)
Name of Acquired Business		Calumet Armature & Electric, LLC (“Calumet”)
Description of Acquired Business		an Illinois-based provider of design, manufacturing, assembly, and repair services of electric motors for the industrial and mass transit markets.
Business Acquisition Shanahan [Member]
Subsequent Event [Line Items]
Subsequent Event Description	a subsidiary of our Commercial & Industrial segment acquired all of the outstanding shares of stock of Shanahan Mechanical and Electrical, Inc. (“Shanahan”)
Name of Acquired Business	Shanahan Mechanical and Electrical, Inc. (“Shanahan”)
Description of Acquired Business	a Nebraska-based provider of mechanical and electrical contracting services.