Operating Segments and Related Information Operating Segments The Companys chief operating decision maker ("CODM"), its Chief Executive Officer, evaluates each of its segments performance and allocates resources based on revenue and segment operating income. Intersegment revenues are recorded at cost and are eliminated in consolidation. The Company and each of its segments employ consistent accounting policies. In the first quarter of 2020, the Company completed a business reorganization as part of its "Project Be Ready" restructuring plan which resulted in identification of two reportable segments (Industrial Technologies and Defense Technologies). The Company commenced operating and reporting under the new organization structure effective January 1, 2020. See Note 19 ,  Restructuring  for further information on Project Be Ready. Industrial Technologies Segment. The Industrial Technologies segment develops and manufactures thermal and visible-spectrum imaging camera cores and components that are utilized by third parties to create thermal, industrial, and other types of imaging systems. The segment also develops, manufactures, and services offerings that image, measure, and analyze thermal energy, gases, and other environmental elements for industrial, commercial, and scientific applications, imaging payloads for Unmanned Aerial Systems ("UAS"), and machine vision cameras. Additionally, the segment develops, manufactures, and services fixed-mounted visible and thermal imaging cameras and related analytics software for perimeter security, critical infrastructure, recreational and commercial maritime, and traffic monitoring and control. Offerings include thermal imaging cameras, analytics software, gas detection cameras, firefighting cameras, process automation cameras, environmental test and measurement devices, security cameras, marine electronics, and traffic cameras. Defense Technologies Segment. The Defense Technologies segment develops and manufactures enhanced imaging and recognition solutions for a wide variety of military, law enforcement, public safety, and other government customers around the world for the protection of borders, troops, and public welfare. The segment also develops and manufactures sensor instruments and integrated platform solutions for the detection, identification, and suppression of chemical, biological, radiological, nuclear, and explosives ("CBRNE") threats for military force protection, homeland security, and commercial applications. Offerings include airborne, land, maritime, and man-portable multi-spectrum imaging systems, radars, lasers, imaging components, integrated multi-sensor system platforms, CBRNE detectors, nano-class UAS solutions, and services related to these systems. The segment also produces advanced multi-mission unmanned air and ground based systems serving US Department of Defense and Federal government agencies, public safety, and governmental customers in international markets. Note 17. Operating Segments and Related Information - (Continued) Operating Segments - (Continued) The following tables present revenue, segment operating income, and segment assets for the two segments. Segment operating income as reviewed by the CODM is revenue less cost of goods sold and operating expenses, excluding general corporate expenses, separation, transaction, and integration costs, amortization of acquired intangible assets, restructuring expenses and asset impairment charges, and discrete legal and compliance matters. Net accounts receivable, inventories and demonstration assets for the operating segments are regularly reviewed by management and are reported below as segment assets. All remaining assets, liabilities, capital expenditures, and depreciation are managed on a Company-wide basis. Segment operating income information is as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 RevenueExternal Customers: Industrial Technologies $ 281,119 $ 257,900 $ 857,732 $ 813,775 Defense Technologies 185,295 213,348 541,620 584,207 $ 466,414 $ 471,248 $ 1,399,352 $ 1,397,982 RevenueIntersegments: Industrial Technologies $ 3,639 $ 3,759 $ 10,269 $ 12,221 Defense Technologies 2,289 959 5,562 3,906 Eliminations (5,928 ) (4,718 ) (15,831 ) (16,127 ) $  $  $  $  Segment operating income: Industrial Technologies $ 87,743 $ 63,713 $ 259,145 $ 204,365 Defense Technologies 38,811 53,809 113,120 146,485 $ 126,554 $ 117,522 $ 372,265 $ 350,850 A reconciliation of the Company's consolidated segment operating income to consolidated earnings before income taxes is as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Consolidated segment operating income $ 126,554 $ 117,522 $ 372,265 $ 350,850 Unallocated corporate expenses (27,812 ) (25,491 ) (93,082 ) (83,416 ) Amortization of purchased intangible assets (11,872 ) (15,477 ) (35,522 ) (42,451 ) Restructuring expenses (293 ) (2,166 ) (28,779 ) (5,776 ) Consolidated earnings from operations 86,577 74,388 214,882 219,207 Loss on debt extinguishment (9,126 )  (9,126 )  Interest and non-operating income (expense) 2,470 (7,262 ) (20,743 ) (19,201 ) Consolidated earnings before income taxes $ 79,921 $ 67,126 $ 185,013 $ 200,006 Unallocated corporate expenses include general corporate expenses, separation, transaction, and integration costs, amortization of acquired intangible assets, restructuring expenses and asset impairment charges, and discrete legal and compliance matters. A reconciliation of the Company's consolidated segment operating assets to consolidated total assets is as follows (in thousands): Note 17. Operating Segments and Related Information - (Continued) Operating Segments - (Continued) September 30, December 31, 2020 2019 Operating segment assets: Net accounts receivable, inventories and demonstration assets: Industrial Technologies $ 420,319 $ 405,166 Defense Technologies 395,752 332,639 $ 816,071 $ 737,805 Goodwill: Industrial Technologies 640,165 635,899 Defense Technologies 710,482 728,697 $ 1,350,647 $ 1,364,596 Total operating segment assets $ 2,166,718 $ 2,102,401 Assets not allocated: Cash and cash equivalents $ 319,995 $ 284,592 Prepaid expenses and other current assets 92,620 86,337 Property and equipment, net 255,457 255,905 Deferred income taxes 37,902 39,983 Intangible assets, net 211,206 247,514 Other assets 129,014 120,809 Total assets $ 3,212,912 $ 3,137,541 Revenue and Long-Lived Assets by Geographic Area Information related to revenue by significant geographical location, determined by the end customer, is as follows (in thousands): Three Months Ended September 30, 2020 Nine Months Ended September 30, 2020 Industrial Technologies Defense Technologies Total Industrial Technologies Defense Technologies Total United States $ 127,594 $ 134,518 $ 262,112 $ 362,232 $ 362,165 $ 724,397 Europe 73,031 24,312 $ 97,343 216,197 69,733 $ 285,930 Asia 53,991 11,214 $ 65,205 188,329 39,292 $ 227,621 Middle East/Africa 9,072 10,135 $ 19,207 41,887 60,357 $ 102,244 Canada/Latin America 17,431 5,116 $ 22,547 49,087 10,073 $ 59,160 $ 281,119 $ 185,295 $ 466,414 $ 857,732 $ 541,620 $ 1,399,352 Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Industrial Technologies Defense Technologies Total Industrial Technologies Defense Technologies Total United States $ 123,495 $ 146,421 $ 269,916 $ 391,574 $ 389,940 $ 781,514 Europe 61,695 24,537 86,232 209,998 76,133 286,131 Asia 50,736 16,080 66,816 145,750 51,014 196,764 Middle East/Africa 7,395 24,571 31,966 23,046 60,793 83,839 Canada/Latin America 14,579 1,739 16,318 43,407 6,327 49,734 $ 257,900 $ 213,348 $ 471,248 $ 813,775 $ 584,207 $ 1,397,982 Note 17. Operating Segments and Related Information - (Continued) Revenue and Long-Lived Assets by Geographic Area - (Continued) Long-lived assets consist of net property and equipment, net identifiable intangible assets, goodwill and other long-term assets. Long-lived assets by significant geographic locations are as follows (in thousands): September 30, December 31, 2020 2019 United States $ 1,125,851 $ 1,137,375 Europe 415,105 435,024 Other foreign 405,368 416,425 $ 1,946,324 $ 1,988,824 Major Customers Revenue derived from major customers is as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 United States government $ 155,437 $ 165,682 $ 417,632 $ 459,336