SEGMENT REPORTING The Company has two reportable segments, the OEM Segment and the Aftermarket Segment. Intersegment sales are insignificant. The OEM Segment, which accounted for 91 percent, 92 percent and 92 percent of consolidated net sales for each of the years ended December 31, 2018, 2017 and 2016, respectively, manufactures and distributes a broad array of engineered components for the leading OEMs in the recreation and industrial product markets, consisting of RVs and adjacent industries, including buses; trailers used to haul boats, livestock, equipment and other cargo; trucks; boats; trains; manufactured homes; and modular housing. Approximately 64 percent of the Companys OEM Segment net sales in 2018 were of components for travel trailer and fifth-wheel RVs. The Aftermarket Segment, which accounted for 9 percent, 8 percent and 8 percent of consolidated net sales for each of the years ended December 31, 2018, 2017 and 2016, respectively, supplies engineered components to the related aftermarket channels of the RV and adjacent industries, primarily to retail dealers, wholesale distributors and service centers. The Aftermarket Segment also includes the sale of replacement glass and awnings to fulfill insurance claims. Decisions concerning the allocation of the Companys resources are made by the Companys Chief Operating Decision Maker (CODM), with oversight by the Board of Directors. The CODM evaluates the performance of each segment based upon segment operating profit or loss, generally defined as income or loss before interest and income taxes. Decisions concerning the allocation of resources are also based on each segments utilization of assets. Management of debt is a corporate function. The accounting policies of the OEM and Aftermarket Segments are the same as those described in Note 2 of the Notes to Consolidated Financial Statements. The following tables presents the Companys revenues disaggregated by segment and geography based on the billing address of the Companys customers for the years ended December 31: 2018 (In thousands) U.S. (a) Intl (b) Total OEM Segment: RV OEMs: Travel trailers and fifth-wheels $ 1,431,574 $ 9,156 $ 1,440,730 Motorhomes 143,488 43,809 187,297 Adjacent industries OEMs 574,100 40,489 614,589 Total OEM Segment net sales 2,149,162 93,454 2,242,616 Aftermarket Segment: Total Aftermarket Segment net sales 222,588 10,603 233,191 Total net sales $ 2,371,750 $ 104,057 $ 2,475,807 2017 (In thousands) U.S. (a) Intl (b) Total OEM Segment: RV OEMs: Travel trailers and fifth-wheels $ 1,403,079 $ 2,904 $ 1,405,983 Motorhomes 138,895 20,522 159,417 Adjacent industries OEMs 398,919 12,304 411,223 Total OEM Segment net sales 1,940,893 35,730 1,976,623 Aftermarket Segment: Total Aftermarket Segment net sales 160,637 10,510 171,147 Total net sales $ 2,101,530 $ 46,240 $ 2,147,770 2016 (In thousands) U.S. (a) Intl (b) Total OEM Segment: RV OEMs: Travel trailers and fifth-wheels $ 1,097,385 $ 2,497 $ 1,099,882 Motorhomes 108,961 7,230 116,191 Adjacent industries OEMs 325,550 6,468 332,018 Total OEM Segment net sales 1,531,896 16,195 1,548,091 Aftermarket Segment: Total Aftermarket Segment net sales 124,733 6,074 130,807 Total net sales $ 1,656,629 $ 22,269 $ 1,678,898 (a) Net sales to customers in the United States of America (b) Net sales to customers domiciled in countries outside of the United States of America Corporate expenses are allocated between the segments based upon net sales. Accretion related to contingent consideration and other non-segment items are included in the segment to which they relate. Information relating to segments follows for the years ended December 31: Segments Corporate (In thousands) OEM Aftermarket Subtotal and Other Total 2018 Net sales to external customers (a) $ 2,242,616 $ 233,191 $ 2,475,807 $  $ 2,475,807 Operating profit (b) 167,459 31,329 198,788  198,788 Total assets (c) 1,034,254 129,776 1,164,030 79,863 1,243,893 Expenditures for long-lived assets (d) 247,895 20,544 268,439  268,439 Depreciation and amortization 63,447 4,079 67,526  67,526 2017 Net sales to external customers (a) $ 1,976,623 $ 171,147 $ 2,147,770 $  $ 2,147,770 Operating profit (b) 190,276 24,005 214,281  214,281 Total assets (c) 785,926 76,309 862,235 83,623 945,858 Expenditures for long-lived assets (d) 148,570 4,875 153,445  153,445 Depreciation and amortization 50,751 3,662 54,413 314 54,727 2016 Net sales to external customers (a) $ 1,548,091 $ 130,807 $ 1,678,898 $  $ 1,678,898 Operating profit (b) 180,850 20,000 200,850  200,850 Total assets (c) 569,385 65,211 634,596 152,308 786,904 Expenditures for long-lived assets (d) 80,588 6,014 86,602  86,602 Depreciation and amortization 42,593 3,298 45,891 276 46,167 (a) Thor Industries, Inc. (Thor), a customer of both segments, accounted for 31 percent, 38 percent and 37 percent of the Companys consolidated net sales for the years ended December 31, 2018, 2017 and 2016, respectively. Berkshire Hathaway Inc. (through its subsidiaries Forest River, Inc. and Clayton Homes, Inc.), a customer of both segments, accounted for 23 percent, 25 percent and 26 percent of the Companys consolidated net sales for the years ended December 31, 2018, 2017 and 2016, respectively. No other customer accounted for more than 10 percent of consolidated net sales in the years ended December 31, 2018, 2017 and 2016. (b) Certain general and administrative expenses are allocated between the segments based upon net sales or operating profit, depending upon the nature of the expense. (c) Segment assets include accounts receivable, inventories, fixed assets, goodwill and other intangible assets. Corporate and other assets include cash and cash equivalents, prepaid expenses and other current assets, deferred taxes, and other assets. (d) Expenditures for long-lived assets include capital expenditures, as well as fixed assets, goodwill and other intangible assets purchased as part of the acquisition of businesses. The Company purchased $150.9 million, $65.0 million and $42.0 million of long-lived assets, as part of the acquisitions of businesses in the years ended December 31, 2018, 2017 and 2016, respectively. Net sales by OEM Segment product were as follows for the years ended December 31: (In thousands) 2018 2017 2016 OEM Segment: Chassis, chassis parts and slide-out mechanisms $ 908,065 $ 914,397 $ 743,160 Windows and doors 615,644 424,625 335,717 Furniture and mattresses 380,514 342,680 245,596 Axles and suspension solutions 122,897 123,513 115,538 Other 215,496 171,408 108,080 Total OEM Segment net sales 2,242,616 1,976,623 1,548,091 Total Aftermarket Segment net sales 233,191 171,147 130,807 Total net sales $ 2,475,807 $ 2,147,770 $ 1,678,898