Using the criteria of ASC 280, Segment Reporting, the Company manages its business under two operating segments, Material Handling and Distribution, consistent with the manner in which our Chief Operating Decision Maker evaluates performance and makes resource allocation decisions. None of the reportable segments include operating segments that have been aggregated. These segments contain individual business components that have been combined on the basis of common management, customers, products, production processes and other economic characteristics. The Company accounts for intersegment sales and transfers at cost plus a specified mark-up.

The Material Handling Segment manufactures a broad selection of plastic reusable containers, pallets, small parts bins, bulk shipping containers, storage and organization products and rotationally-molded plastic tanks for water, fuel and waste handling. This segment conducts its primary operations in the United States and Canada. Markets served include industrial manufacturing, food processing, retail/wholesale products distribution, agriculture, automotive, recreational vehicles, marine vehicles, healthcare, appliance, bakery, electronics, textiles, consumer, and others. Products are sold both directly to end-users and through distributors.

The Distribution Segment is engaged in the distribution of equipment, tools, and supplies used for tire servicing and automotive undervehicle repair and the manufacture of tire repair and retreading products. The product line includes categories such as tire valves and accessories, tire changing and balancing equipment, lifts and alignment equipment, service equipment and tools, and tire repair/retread supplies. The Distribution Segment operates domestically through its sales offices and four regional distribution centers in the United States, and in certain foreign countries through export sales. In addition, the Distribution Segment operates directly in certain foreign markets, principally Central America, through foreign branch operations. Markets served include retail and truck tire dealers, commercial auto and truck fleets, auto dealers, general service and repair centers, tire retreaders, and government agencies.

Total sales from foreign business units were approximately $50.6 million, $53.9 million, and $64.2 million for the years ended December 31, 2018, 2017 and 2016, respectively. Total export sales to countries outside the U.S. were approximately $19.6 million, $17.2 million, and $18.6 million for the years ended December 31, 2018, 2017 and 2016, respectively. Sales made to customers in Canada accounted for approximately 4.1% of total net sales in 2018, 2.4% in 2017 and 4.6% in 2016. There are no other individual foreign countries for which sales are material. Long-lived assets in foreign countries, primarily in Canada, consisted of property, plant and equipment, and were approximately $14.1 million at December 31, 2018 and $17.6 million at December 31, 2017.

	2018			2017			2016
Net Sales
Material Handling	$	417,199		$	391,313		$	363,956
Distribution		149,636			156,428			170,660
Inter-company sales		(100	)		(698	)		(237	)
Total net sales	$	566,735		$	547,043		$	534,379

Income (loss) from continuing operations before income taxes
Material Handling	$	57,948		$	38,874		$	40,776
Distribution		7,441			9,073			12,834
Corporate		(59,062	)		(23,059	)		(26,248	)
Total operating income		6,327			24,888			27,362
Interest expense, net		(4,938	)		(7,292	)		(8,643	)
Loss on extinguishment of debt		—			(1,888	)		—
Income from continuing operations before income taxes	$	1,389		$	15,708		$	18,719

Identifiable Assets
Material Handling	$	229,962		$	257,863		$	268,634
Distribution		48,575			49,822			56,072
Corporate		70,108			48,257			36,271
Discontinued operations		—			—			20,707
Total identifiable assets	$	348,645		$	355,942		$	381,684

Capital Additions, Net
Material Handling	$	4,500		$	5,165		$	10,933
Distribution		587			622			1,424
Corporate		36			27			132
Total capital additions, net	$	5,123		$	5,814		$	12,489

Depreciation and Amortization
Material Handling	$	24,159		$	28,506		$	29,270
Distribution		1,169			1,174			1,221
Corporate		811			1,151			1,301
Total depreciation and amortization	$	26,139		$	30,831		$	31,792