Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Schedule of Operating Results by Segment

ur operations are assessed based on three reportable segments, which changed beginning in the third quarter of 2016 with the purchase of SPIG as described in Note 4. Segment results for prior periods have been restated for comparative purposes.

• Power segment: Focused on the supply of and aftermarket services for steam-generating, environmental, and auxiliary equipment for power generation and other industrial applications.

• Renewable segment: Focused on the supply of steam-generating systems, environmental and auxiliary equipment for the waste-to-energy and biomass power generation industries.

• Industrial segment: Focused on custom-engineered cooling, environmental, and other industrial equipment along with related aftermarket services.

An analysis of our operations by segment is as follows:

	Year Ended December 31,
(in thousands)	2016			2015			2014
REVENUES
Power segment
Retrofits & continuous emissions monitoring systems	$	392,854		$	427,378		$	323,623
New build utility and environmental	292,302			403,981			343,956
Aftermarket parts and field engineering services	292,535			304,923			349,398
Industrial steam generation	107,267			219,379			208,229
Eliminations	(109,480		)	(120,664		)	(68,627		)
	975,478			1,234,997			1,156,579
Renewable segment
Renewable new build and services	284,684			277,326			171,004
Operations and maintenance	65,814			63,437			57,977
Eliminations	(1,326		)	(2,160		)	(4,949		)
	349,172			338,603			224,032
Industrial segment
Industrial aftermarket parts and services	81,690			61,350			35,290
Environmental solutions	74,726			90,343			48,938
Cooling systems	73,797			—			—
Engineered products	23,400			32,002			21,190
	253,613			183,695			105,418
	$	1,578,263		$	1,757,295		$	1,486,029