Business and Organization (Tables)

12 Months Ended

Dec. 31, 2017

Business and Organization

Schedule of service activities

	Revenue
Service Activity	$ in thousands		%
HVAC and Plumbing	$	1,615,468	90	%
Building Automation Control Systems		94,041	5	%
Other		78,413	5	%
Total	$	1,787,922	100	%