(7)	SEGMENT DATA

The Company’s operations are aggregated into two reportable business segments as follows:

Marine Transportation — Provides marine transportation principally by United States flag vessels of liquid cargoes throughout the United States inland waterway system, along all three United States coasts, in Alaska and Hawaii and, to a lesser extent, in United States coastal transportation of dry-bulk cargoes. The principal products transported include petrochemicals, black oil, refined petroleum products and agricultural chemicals.

Diesel Engine Services — Provides after-market services for medium-speed and high-speed diesel engines, reduction gears and ancillary products for marine and power generation applications, distributes and services high-speed diesel engines, transmissions and pumps, and manufactures and remanufactures oilfield service equipment, including pressure pumping units, for the land-based oilfield service and oil and gas operator and producer markets.

The Company’s two reportable business segments are managed separately based on fundamental differences in their operations. The Company evaluates the performance of its segments based on the contributions to operating income of the respective segments, before income taxes, interest, gains or losses on disposition of assets, other nonoperating income, noncontrolling interests, accounting changes, and nonrecurring Items. Intersegment revenues, based on market-based pricing, of the diesel engine services segment from the marine transportation segment of $4,384,000 and $7,360,000 for the three months ending March 31, 2016 and 2015, respectively, as well as the related intersegment profit of $438,000 and $736,000 for the three months ending March 31, 2016 and 2015, respectively, have been eliminated from the tables below.

The following table sets forth the Company’s revenues and profit or loss by reportable segment for the three months ended March 31, 2016 and 2015 and total assets as of March 31, 2016 and December 31, 2015 (in thousands):

	Three months ended March 31,
	2016			2015
Revenues:
Marine transportation	$	378,343		$	419,905
Diesel engine services		80,390			167,768
	$	458,733		$	587,673
Segment profit (loss):
Marine transportation	$	69,795		$	96,269
Diesel engine services		(806	)		8,843
Other		(7,646	)		(7,210	)
	$	61,343		$	97,902

	March 31, 2016		December 31, 2015
Total assets:
Marine transportation	$	3,438,587	$	3,451,553
Diesel engine services		618,924		637,549
Other		51,475		63,179
	$	4,108,986	$	4,152,281

The following table presents the details of “Other” segment loss for the three months ended March 31, 2016 and 2015 (in thousands):

	Three months ended March 31,
	2016			2015
General corporate expenses	$	(3,655	)	$	(3,575	)
Gain on disposition of assets		67			1,555
Interest expense		(4,193	)		(5,250	)
Other income		135			60
	$	(7,646	)	$	(7,210	)

The following table presents the details of “Other” total assets as of March 31, 2016 and December 31, 2015 (in thousands):

	March 31, 2016		December 31, 2015
General corporate assets	$	49,250	$	61,089
Investment in affiliates		2,225		2,090
	$	51,475	$	63,179