(11) SEGMENT AND GEOGRAPHIC REPORTING The Company has three reportable segments  domestic wholesale sales, international wholesale sales, and retail sales, which includes e-commerce sales. Management evaluates segment performance based primarily on net sales and gross profit. All other costs and expenses of the Company are analyzed on an aggregate basis, and these costs are not allocated to the Companys segments. Net sales, gross margins, identifiable assets and additions to property and equipment for the domestic wholesale, international wholesale, retail sales segments on a combined basis were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Net sales: Domestic wholesale $ 285,406 $ 294,127 $ 991,658 $ 993,664 International wholesale 531,123 475,177 1,573,955 1,323,688 Retail 359,866 325,525 995,657 876,219 Total $ 1,176,395 $ 1,094,829 $ 3,561,270 $ 3,193,571 Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Gross profit: Domestic wholesale $ 110,572 $ 110,693 $ 372,166 $ 376,502 International wholesale 240,056 219,260 752,336 594,898 Retail 213,238 190,034 583,424 513,406 Total $ 563,866 $ 519,987 $ 1,707,926 $ 1,484,806 September 30, 2018 December 31, 2017 Identifiable assets: Domestic wholesale $ 1,340,561 $ 1,259,119 International wholesale 1,262,200 1,116,928 Retail 401,714 359,035 Total $ 3,004,475 $ 2,735,082 Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Additions to property, plant and equipment: Domestic wholesale $ 10,654 $ 5,418 $ 28,320 $ 8,699 International wholesale 13,711 14,461 31,118 45,884 Retail 12,126 5,782 37,871 47,580 Total $ 36,491 $ 25,661 $ 97,309 $ 102,163 Geographic Information: The following summarizes the Companys operations in different geographic areas for the periods indicated (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Net Sales (1) : United States $ 523,281 $ 514,235 $ 1,648,642 $ 1,595,078 Canada 44,646 46,979 146,080 133,362 Other international (2) 608,468 533,615 1,766,548 1,465,131 Total $ 1,176,395 $ 1,094,829 $ 3,561,270 $ 3,193,571 September 30, 2018 December 31, 2017 Property, plant and equipment, net: United States $ 392,891 $ 382,426 Canada 9,730 9,888 Other international (2) 162,774 149,287 Total $ 565,395 $ 541,601 _____________________ (1) The Company has subsidiaries in Asia, Central America, Europe, the Middle East, North America, and South America that generate net sales within those respective regions and in some cases the neighboring regions. The Company has joint ventures in Asia that generate net sales from those regions. The Company also has a subsidiary in Switzerland that generates net sales from that country in addition to net sales to distributors located in numerous non-European countries. External net sales are attributable to geographic regions based on the location of each of the Companys subsidiaries. A subsidiary may earn revenue from external net sales and external royalties, or from inter-subsidiary net sales, royalties, fees and commissions provided in accordance with certain inter-subsidiary agreements. The resulting earnings of each subsidiary in its respective country are recognized under each respective countrys tax code. Inter-subsidiary revenues and expenses subsequently are eliminated in the Companys condensed consolidated financial statements and are not included as part of the external net sales reported in different geographic areas. (2) Other international includes Asia, Central America, Europe, the Middle East, and South America. In response to the State Departments trade restrictions with Sudan and Syria, we do not authorize or permit any distribution or sales of our product in these countries, and we are not aware of any current or past distribution or sales of our product in Sudan or Syria.