(9)	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, and 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 $4,945,000 and $10,375,000 for the three months and six months ending June 30, 2017, respectively, and $6,167,000 and $10,551,000 for the three months and six months ending June 30, 2016, respectively, have been eliminated from the tables below. The related intersegment profit of $494,000 and $1,037,000 for the three months and six months ending June 30, 2017, respectively, and $617,000 and $1,055,000 for the three months and six months ending June 30, 2016, respectively, have also 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 and six months ended June 30, 2017 and 2016 and total assets as of June 30, 2017 and December 31, 2016 (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2017			2016			2017			2016
Revenues:
Marine transportation	$	331,265		$	378,303		$	674,917		$	756,646
Diesel engine services		142,063			63,279			290,116			143,669
	$	473,328		$	441,582		$	965,033		$	900,315
Segment profit (loss):
Marine transportation	$	35,766		$	72,726		$	71,020		$	142,521
Diesel engine services		16,355			(1,968	)		30,089			(2,774	)
Other		(9,106	)		(8,284	)		(17,096	)		(15,930	)
	$	43,015		$	62,474		$	84,013		$	123,817

	June 30, 2017		December 31, 2016
Total assets:
Marine transportation	$	3,539,345	$	3,613,951
Diesel engine services		633,583		623,268
Other		52,428		52,676
	$	4,225,356	$	4,289,895

The following table presents the details of “Other” segment loss for the three months and six months ended June 30, 2017 and 2016 (in thousands):

	Three months ended June 30,						Six months ended June 30,
	2017			2016			2017			2016

General corporate expenses	$	(4,501	)	$	(4,044	)	$	(8,017	)	$	(7,699	)
Gain (loss) on disposition of assets		(139	)		94			(40	)		161
Interest expense		(4,465	)		(4,513	)		(8,922	)		(8,706	)
Other income (expense)		(1	)		179			(117	)		314
	$	(9,106	)	$	(8,284	)	$	(17,096	)	$	(15,930	)

The following table presents the details of “Other” total assets as of June 30, 2017 and December 31, 2016 (in thousands):

	June 30, 2017		December 31, 2016
General corporate assets	$	50,681	$	50,054
Investment in affiliates		1,747		2,622
	$	52,428	$	52,676