Commitments and Contingencies Restructuring and Related Activities (Tables)

9 Months Ended

Sep. 30, 2014

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Reserve by Type of Cost [Table Text Block]

The changes in restructuring activity by reportable segments during the nine months ended September 30, 2014 and September 30, 2013 were as follows (in thousands):    

	United States electrical construction and facilities services segment			United States mechanical construction and facilities services segment			United States building services segment			Corporate administration			Total
Balance at December 31, 2012	$	53		$	—		$	—		$	—		$	53
Charges	—			473			179			—			652
Payments	(18		)	(129		)	(162		)	—			(309		)
Balance at September 30, 2013	$	35		$	344		$	17		$	—		$	396
Balance at December 31, 2013	$	30		$	164		$	—		$	—		$	194
Charges	375			124			—			300			799
Payments	(405		)	(114		)	—			(300		)	(819		)
Balance at September 30, 2014	$	—		$	174		$	—		$	—		$	174

Restructuring and Related Costs [Table Text Block]

A summary of restructuring expenses by reportable segments recognized for the nine months ended September 30, 2014 was as follows (in thousands):

	United States electrical construction and facilities services segment		United States mechanical construction and facilities services segment			United States building services segment		Corporate administration		Total
Severance	$	375	$	205		$	—	$	—	$	580
Leased facilities	—		(81		)	—		300		219
Total charges	$	375	$	124		$	—	$	300	$	799