Commitments and Contingencies Restructuring and Related Activities (Tables)

6 Months Ended

Jun. 30, 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 six months ended June 30, 2015 and June 30, 2014 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		Corporate administration			Total
Balance at December 31, 2013	$	30		$	164		$	—	$	—		$	194
Charges	182			(81		)	—		300			401
Payments	(57		)	(83		)	—		(300		)	(440		)
Balance at June 30, 2014	$	155		$	—		$	—	$	—		$	155
Balance at December 31, 2014	$	255		$	26		$	—	$	—		$	281
Charges	(106		)	6			541		—			441
Payments	(149		)	(32		)	—		—			(181		)
Balance at June 30, 2015	$	—		$	—		$	541	$	—		$	541

Restructuring and Related Costs [Table Text Block]

A summary of restructuring expenses by reportable segments recognized for the six months ended June 30, 2015 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		Corporate administration		Total
Severance	$	—		$	6	$	541	$	—	$	547
Leased facilities	(106		)	—		—		—		(106		)
Total charges	$	(106	)	$	6	$	541	$	—	$	441