Commitments and Contingencies Restructuring and Related Activities (Tables)

3 Months Ended

Mar. 31, 2015

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 three months ended March 31, 2015 and March 31, 2014 were as follows (in thousands):



	United States electrical construction and facilities services segment			United States mechanical construction and facilities services segment			Corporate administration		Total
Balance at December 31, 2013	$	30		$	164		$	—	$	194
Charges	—			(75		)	300		225
Payments	(6		)	(89		)	—		(95		)
Balance at March 31, 2014	$	24		$	—		$	300	$	324
Balance at December 31, 2014	$	255		$	26		$	—	$	281
Charges	2			6			—		8
Payments	(18		)	(32		)	—		(50		)
Balance at March 31, 2015	$	239		$	—		$	—	$	239

Restructuring and Related Costs [Table Text Block]

A summary of restructuring expenses by reportable segments recognized for the three months ended March 31, 2015 was as follows (in thousands):



	United States electrical construction and facilities services segment		United States mechanical construction and facilities services segment		Corporate administration		Total
Severance	$	—	$	6	$	—	$	6
Leased facilities	2		—		—		2
Total charges	$	2	$	6	$	—	$	8