Note 11. Segment Information The Company is managed based on the primary products it manufactures: pulp and wood products. Accordingly, the Company's four pulp mills and its 50% interest in the Cariboo mill are aggregated into the pulp segment, and the Friesau sawmill is a separate reportable segment, wood products. The Company's sandalwood business is included in corporate and other as it does not meet the criteria to be reported as a separate reportable segment. None of the income or loss items following operating income in the Company's Interim Consolidated Statements of Operations are allocated to the segments, as those items are reviewed separately by management. Information about certain segment data for the three and nine month periods ended September 30, 2020 and 2019, was as follows: Three Months Ended September 30, 2020 Pulp Wood Products Corporate and Other Consolidated Revenues from external customers $ 274,916 $ 57,053 $ 1,182 $ 333,151 Operating income (loss) $ 3,753 $ 11,963 $ (1,980 ) $ 13,736 Depreciation and amortization $ 28,251 $ 3,446 $ 187 $ 31,884 Revenues by major products Pulp $ 253,056 $  $  $ 253,056 Lumber  53,612  53,612 Energy and chemicals 21,860 2,226 1,182 25,268 Wood residuals  1,215  1,215 Total revenues $ 274,916 $ 57,053 $ 1,182 $ 333,151 Revenues by geographical markets (a) U.S. $ 29,295 $ 31,466 $ 540 $ 61,301 Germany 79,535 11,744  91,279 China 83,554   83,554 Other countries 82,532 13,843 642 97,017 Total revenues $ 274,916 $ 57,053 $ 1,182 $ 333,151 (a) Sales are attributed to countries based on the ship-to location provided by the customer. Note 11. Segment Information (continued) Three Months Ended September 30, 2019 Pulp Wood Products Corporate and Other Consolidated Revenues from external customers $ 345,060 $ 36,458 $ 2,018 $ 383,536 Operating income (loss) $ 21,386 $ 544 $ (3,183 ) $ 18,747 Depreciation and amortization $ 29,744 $ 2,016 $ 292 $ 32,052 Revenues by major products Pulp $ 322,707 $  $  $ 322,707 Lumber  32,687  32,687 Energy and chemicals 22,353 1,621 2,018 25,992 Wood residuals  2,150  2,150 Total revenues $ 345,060 $ 36,458 $ 2,018 $ 383,536 Revenues by geographical markets (a) U.S. $ 30,693 $ 13,027 $  $ 43,720 Germany 97,339 11,915  109,254 China 113,578   113,578 Other countries 103,450 11,516 2,018 116,984 Total revenues $ 345,060 $ 36,458 $ 2,018 $ 383,536 (a) Sales are attributed to countries based on the ship-to location provided by the customer. Nine Months Ended September 30, 2020 Pulp Wood Products Corporate and Other Consolidated Revenues from external customers $ 876,567 $ 144,558 $ 3,820 $ 1,024,945 Operating income (loss) $ 33,302 $ 21,845 $ (7,034 ) $ 48,113 Depreciation and amortization $ 85,841 $ 8,627 $ 563 $ 95,031 Total assets (a) $ 1,767,397 $ 99,743 $ 177,595 $ 2,044,735 Revenues by major products Pulp $ 808,923 $  $  $ 808,923 Lumber  132,209  132,209 Energy and chemicals 67,644 7,486 3,820 78,950 Wood residuals  4,863  4,863 Total revenues $ 876,567 $ 144,558 $ 3,820 $ 1,024,945 Revenues by geographical markets (b) U.S. $ 102,813 $ 66,710 $ 1,701 $ 171,224 Germany 246,775 38,941  285,716 China 247,916   247,916 Other countries 279,063 38,907 2,119 320,089 Total revenues $ 876,567 $ 144,558 $ 3,820 $ 1,024,945 (a) Total assets for the pulp segment includes the Company's $47,865 investment in joint ventures, primarily for the Cariboo mill. (b) Sales are attributed to countries based on the ship-to location provided by the customer. Note 11. Segment Information (continued) Nine Months Ended September 30, 2019 Pulp Wood Products Corporate and Other Consolidated Revenues from external customers $ 1,166,333 $ 120,349 $ 6,557 $ 1,293,239 Operating income (loss) $ 157,157 $ 2,075 $ (9,123 ) $ 150,109 Depreciation and amortization $ 87,616 $ 5,937 $ 894 $ 94,447 Revenues by major products Pulp $ 1,095,225 $  $  $ 1,095,225 Lumber  107,172  107,172 Energy and chemicals 71,108 7,075 6,557 84,740 Wood residuals  6,102  6,102 Total revenues $ 1,166,333 $ 120,349 $ 6,557 $ 1,293,239 Revenues by geographical markets (a) U.S. $ 124,039 $ 38,997 $  $ 163,036 Germany 338,678 40,860  379,538 China 347,232   347,232 Other countries 356,384 40,492 6,557 403,433 Total revenues $ 1,166,333 $ 120,349 $ 6,557 $ 1,293,239 (a) Sales are attributed to countries based on the ship-to location provided by the customer. As of December 31, 2019, the Company had total assets of $1,782,105 in the pulp segment, $83,102 in the wood products segment and $200,513 in corporate and other. Total assets for the pulp segment includes the Company's $53,122 investment in joint ventures, primarily for the Cariboo mill. Revenues between segments are accounted for at prices that approximate fair value. These include revenues from the sale of residual fiber from the wood products segment to the pulp segment for use in the pulp production process and from the sale of residual fuel from the pulp segment to the wood products segment for use in energy production. For the three and nine month periods ended September 30, 2020, the pulp segment sold $42 and $388, respectively of residual fuel to the wood products segment (2019  $59 and $423) and the wood products segment sold $2,246 and $9,676, respectively of residual fiber to the pulp segment (2019  $2,360 and $11,713).