Business Segment Information

We have three reportable business segments: Well Intervention, Robotics and Production Facilities. Our U.S., U.K. and Brazil well intervention operating segments are aggregated into the Well Intervention business segment for financial reporting purposes. Our Well Intervention segment includes our vessels and/or equipment used to perform well intervention services in the U.S. Gulf of Mexico, Brazil, the North Sea and West Africa. Our Well Intervention segment also includes IRSs, some of which we provide on a stand-alone basis, and SILs. Our well intervention vessels include the Q4000, the Q5000, the Seawell, the Well Enhancer and the chartered Siem Helix 1 and Siem Helix 2 vessels. Our Robotics segment includes ROVs, trenchers and ROVDrills, which are designed to complement offshore construction and well intervention services, and three ROV support vessels under long-term charter: the Grand Canyon, the Grand Canyon II and the Grand Canyon III. Our Production Facilities segment includes the HP I, the HFRS and our investment in Independence Hub that is accounted for under the equity method. All material intercompany transactions between the segments have been eliminated.

We evaluate our performance primarily based on operating income of each reportable segment. Certain financial data by reportable segment are summarized as follows (in thousands):



	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Net revenues —
Well Intervention	$	154,441		$	111,522		$	445,769		$	299,219
Robotics	54,340			47,049			120,569			102,078
Production Facilities	15,877			16,380			48,541			47,965
Intercompany elimination	(12,083		)	(11,691		)	(33,417		)	(31,145		)
Total	$	212,575		$	163,260		$	581,462		$	418,117

Income (loss) from operations —
Well Intervention	$	34,427		$	16,906		$	82,774		$	37,356
Robotics	5,601			(9,365		)	(12,818		)	(37,313		)
Production Facilities	6,694			7,660			20,919			20,724
Corporate and other	(15,567		)	(10,633		)	(36,507		)	(29,296		)
Intercompany elimination	222			199			665			641
Total	$	31,377		$	4,767		$	55,033		$	(7,888	)

Intercompany segment amounts are derived primarily from equipment and services provided to other business segments at rates consistent with those charged to third parties. Intercompany segment revenues are as follows (in thousands):



	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017

Well Intervention	$	4,379	$	3,765	$	10,546	$	8,033
Robotics	7,704		7,926		22,871		23,112
Total	$	12,083	$	11,691	$	33,417	$	31,145

Segment assets are comprised of all assets attributable to each reportable segment. Corporate and other includes all assets not directly identifiable with our business segments, most notably the majority of our cash and cash equivalents. The following table reflects total assets by reportable segment (in thousands):



	September 30, 2018		December 31, 2017

Well Intervention	$	1,912,197	$	1,830,733
Robotics	161,079		179,853
Production Facilities	123,160		138,292
Corporate and other	182,039		213,959
Total	$	2,378,475	$	2,362,837