(7)	SEGMENT DATA

The Company’s operations are classified 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, 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, 2015 and 2014 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, 2015 and 2014 and total assets as of June 30, 2015 and December 31, 2014 (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2015			2014			2015			2014
Revenues:
Marine transportation	$	425,053		$	456,745		$	844,958		$	892,516
Diesel engine services		118,103			171,309			285,871			324,784
	$	543,156		$	628,054		$	1,130,829		$	1,217,300
Segment profit (loss):
Marine transportation	$	97,011		$	115,968		$	193,280		$	213,519
Diesel engine services		4,931			14,337			13,774			27,109
Other		(8,870	)		(8,626	)		(16,080	)		(17,949	)
	$	93,072		$	121,679		$	190,974		$	222,679

	June 30, 2015		December 31, 2014
Total assets:
Marine transportation	$	3,425,973	$	3,317,696
Diesel engine services		673,675		736,129
Other		54,855		88,084
	$	4,154,503	$	4,141,909

The following table presents the details of “Other” segment loss for the three months and six months ended June 30, 2015 and 2014 (in thousands):

	Three months ended June 30,								Six months ended June 30,
	2015				2014				2015				2014

General corporate expenses		$	(3,899	)		$	(3,807	)		$	(7,474	)		$	(7,327	)
Gain on disposition of assets			91				527				1,646				578
Interest expense			(4,759	)			(5,469	)			(10,009	)			(11,087	)
Other income (expense)			(303	)			123				(243	)			(113	)
		$	(8,870	)		$	(8,626	)		$	(16,080	)		$	(17,949	)

The following table presents the details of “Other” total assets as of June 30, 2015 and December 31, 2014 (in thousands):

	June 30, 2015		December 31, 2014
General corporate assets	$	52,983	$	85,545
Investment in affiliates		1,872		2,539
	$	54,855	$	88,084