(8)	SEGMENT DATA

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

Marine Transportation — Marine transportation principally by United States flag vessels of liquid cargoes throughout the United States inland waterway system, along all three United States coasts, Alaska and Hawaii and, to a lesser extent, 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, and distributes and services high-speed diesel engines, transmissions, pumps and compression products, and manufactures and remanufactures oilfield service equipment, including pressure pumping units, for the land-based pressure pumping and oilfield service 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, and before income taxes, interest, gains or losses on disposition of assets, other nonoperating income, noncontrolling interests, accounting changes, and nonrecurring items. Intersegment sales for the three months and six months ended June 30, 2014 and 2013 were not significant.

The following table sets forth the Company’s revenues and profit or loss by reportable segment for the three months and six months ended June 30, 2014 and 2013 and total assets as of June 30, 2014 and December 31, 2013 (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2014			2013			2014			2013
Revenues:
Marine transportation	$	456,745		$	423,868		$	892,516		$	842,386
Diesel engine services		171,309			140,040			324,784			280,307
	$	628,054		$	563,908		$	1,217,300		$	1,122,693
Segment profit (loss):
Marine transportation	$	115,968		$	97,563		$	213,519		$	186,816
Diesel engine services		14,337			14,932			27,109			28,954
Other		(8,626	)		(10,361	)		(17,949	)		(21,700	)
	$	121,679		$	102,134		$	222,679		$	194,070

	June 30, 2014		December 31, 2013
Total assets:
Marine transportation	$	3,205,275	$	3,046,692
Diesel engine services		604,730		576,472
Other		57,875		59,353
	$	3,867,880	$	3,682,517

The following table presents the details of “Other” segment loss for the three months and six months ended June 30, 2014 and 2013 (in thousands):

	Three months ended June 30,								Six months ended June 30,
	2014				2013				2014				2013

General corporate expenses		$	(3,807	)		$	(3,780	)		$	(7,327	)		$	(7,174	)
Gain on disposition of assets			527				537				578				505
Interest expense			(5,469	)			(7,219	)			(11,087	)			(15,207	)
Other income (expense)			123				101				(113	)			176
		$	(8,626	)		$	(10,361	)		$	(17,949	)		$	(21,700	)

The following table presents the details of “Other” total assets as of June 30, 2014 and December 31, 2013 (in thousands):

	June 30, 2014		December 31, 2013
General corporate assets	$	55,537	$	57,197
Investment in affiliates		2,338		2,156
	$	57,875	$	59,353