(9)	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, coastwise along all three United States coasts and in 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, 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, 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, 2013 and 2012 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, 2013 and 2012 and total assets as of June 30, 2013 and December 31, 2012 (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Revenues:
Marine transportation	$	423,868		$	342,195		$	842,386		$	678,152
Diesel engine services		140,040			169,653			280,307			400,631
	$	563,908		$	511,848		$	1,122,693		$	1,078,783
Segment profit (loss):
Marine transportation	$	97,563		$	71,730		$	186,816		$	140,220
Diesel engine services		14,932			15,118			28,954			38,672
Other		(10,361	)		(9,021	)		(21,700	)		(17,696	)
	$	102,134		$	77,827		$	194,070		$	161,196

	June 30, 2013		December 31, 2012
Total assets:
Marine transportation	$	3,054,231	$	2,951,723
Diesel engine services		616,496		647,986
Other		53,582		53,419
	$	3,724,309	$	3,653,128

The following table presents the details of “Other” segment loss for the three months and six months ended June 30, 2013 and 2012 (in thousands):

		Three months ended June 30,						Six months ended June 30,
		2013			2012			2013			2012

General corporate expenses	$	(3,780	)	$	(3,219	)	$	(7,174	)	$	(6,175	)
Gain on disposition of assets		537			69			505			41
Interest expense		(7,219	)		(5,901	)		(15,207	)		(11,741	)
Other income		101			30			176			179
	$	(10,361	)	$	(9,021	)	$	(21,700	)	$	(17,696	)

The following table presents the details of “Other” total assets as of June 30, 2013 and December 31, 2012 (in thousands):

	June 30, 2013		December 31, 2012
General corporate assets	$	51,574	$	51,611
Investment in affiliates		2,008		1,808
	$	53,582	$	53,419