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 primarily in the U.S. Gulf of Mexico, Brazil, the North Sea and West Africa. 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 well intervention equipment includes IRSs, some of which we provide on a stand-alone basis, and SILs. Our Robotics segment includes ROVs, trenchers and a ROVDrill, 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, our ownership interest in Independence Hub (Note 4) and our ownership of certain oil and gas properties that we acquired from Marathon Oil in January 2019 (Note 13). All material intercompany transactions between the segments have been eliminated.

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



	Three Months Ended March 31,
	2019			2018
Net revenues —
Well Intervention	$	122,231		$	129,569
Robotics	39,041			27,169
Production Facilities	15,253			16,321
Intercompany eliminations	(9,702		)	(8,797		)
Total	$	166,823		$	164,262

Income (loss) from operations —
Well Intervention	$	9,641		$	13,877
Robotics	(3,904		)	(14,317		)
Production Facilities	4,405			7,359
Segment operating income	10,142			6,919
Corporate, eliminations and other	(9,873		)	(8,035		)
Total	$	269		$	(1,116	)

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 March 31,
	2019		2018

Well Intervention	$	3,225	$	1,952
Robotics	6,477		6,845
Total	$	9,702	$	8,797

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):



	March 31, 2019		December 31, 2018

Well Intervention	$	2,104,002	$	1,916,638
Robotics	190,473		147,602
Production Facilities	182,830		120,845
Corporate and other	130,016		162,645
Total	$	2,607,321	$	2,347,730