Restructuring and Related Activities (Tables)

12 Months Ended

Dec. 31, 2018

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Reserve by Type of Cost

The changes in restructuring activity by reportable segments during the years ended December 31, 2018 and 2017 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, 2016	$	—		$	188		$	13		$	—	$	201
Charges	452			180			945			—		1,577
Payments	—			(368		)	(918		)	—		(1,286		)
Balance at December 31, 2017	452			—			40			—		492
Charges	—			—			882			1,424		2,306
Payments	(422		)	—			(746		)	—		(1,168		)
Balance at December 31, 2018	$	30		$	—		$	176		$	1,424	$	1,630

Restructuring and Related Costs

A summary of restructuring expenses by reportable segments recognized for the year ended December 31, 2018 was as follows (in thousands):

	United States building services segment		Corporate Administration		Total
Severance	$	882	$	1,424	$	2,306