Restructuring and Related Activities (Tables)

12 Months Ended

Dec. 31, 2017

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, 2017 and December 31, 2016 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			Total
Balance at December 31, 2015	$	—	$	—		$	81		$	81
Charges	—		519			919			1,438
Payments	—		(331		)	(987		)	(1,318		)
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

Restructuring and Related Costs

A summary of restructuring expenses by reportable segments recognized for the year ended December 31, 2017 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		Total
Severance	$	391	$	180	$	945	$	1,516
Leased facilities	61		—		—		61
Total charges	$	452	$	180	$	945	$	1,577