Business Combination (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	May. 21, 2015	Mar. 31, 2016	Mar. 31, 2016	Mar. 31, 2015
Business Acquisition [Line Items]
Cash Paid for Acquisition			$ 8,307	$ 0
Goodwill Written Off Related To Sale Of Business Unit			577
Infrastructure Solutions [Member]
Business Acquisition [Line Items]
Goodwill Written Off Related To Sale Of Business Unit			577
Loss on Sale of Assets From Divestiture			778
Business Acquisition Shanahan and Calumet [Member]
Business Acquisition [Line Items]
Name of Acquired Business		Calumet Armature & Electric, LLC (“Calumet”) & Shanahan Mechanical and Electrical, Inc. (“Shanahan”)
Total Consideration Transferred			8,555
Cash Purchase Consideration			8,107
Cash Paid for Acquisition			7,338
Additional Consideration To Be Paid			769
Minimum Contingent Consideration Value		$ 448	448
Maximum Contingent Consideration Value		2,250	2,250
Contingent Consideration Fair Value		$ 714	$ 714
Business Acquisition Southern Rewind [Member]
Business Acquisition [Line Items]
Name of Acquired Business			Southern Industrial Sales and Services, Inc. (“Southern Rewinding”)
Description of Acquired Business			a Columbus, Georgia-based motor repair and related field services company
Date of Acquisition Agreement	May 21, 2015
Total Consideration Transferred	$ 3,937
Cash Purchase Consideration	3,137
Cash Paid for Acquisition			$ 200
Additional Consideration To Be Paid	800		$ 600
Working Capital Transfer	$ 1,065