Industry Segments and Foreign Operations Our operations are managed through two operating segments: (i) Polymer segment; and (ii) Chemical segment. In accordance with the provisions of ASC 280, Segment Reporting , our chief operating decision maker has been identified as our President and Chief Executive Officer, who reviews operating results to make decisions about allocating resources and assessing performance for the entire company.  Polymer Segment is comprised of our SBCs and other engineered polymers business.  Chemical Segment is comprised of our pine-based specialty products business. Our chief operating decision maker uses operating income (loss) as the primary measure of each segment's operating results in order to allocate resources and in assessing the company's performance. In accordance with ASC 280, Segment Reporting , we have presented operating income for each segment. The following table summarizes our operating results by segment. We do not have sales between segments. Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) Revenue $ 297,861 $ 197,419 $ 495,280 $ 338,150 $ 200,245 $ 538,395 Cost of goods sold 218,995 147,083 366,078 228,304 139,382 367,686 Gross profit 78,866 50,336 129,202 109,846 60,863 170,709 Operating expenses: Research and development 7,338 2,835 10,173 7,386 3,088 10,474 Selling, general, and administrative 22,206 16,251 38,457 24,461 17,514 41,975 Depreciation and amortization 14,343 17,561 31,904 17,598 17,542 35,140 Gain on insurance proceeds  (7,500 ) (7,500 )    Loss on disposal of fixed assets    170 163 333 Operating income $ 34,979 $ 21,189 56,168 $ 60,231 $ 22,556 82,787 Other expense (417 ) (1,107 ) Loss on extinguishment of debt  (72,330 ) Earnings of unconsolidated joint venture 140 120 Interest expense, net (19,339 ) (25,416 ) Income (loss) before income taxes $ 36,552 $ (15,946 ) Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) Revenue $ 558,916 $ 392,775 $ 951,691 $ 627,221 $ 413,566 $ 1,040,787 Cost of goods sold 426,164 289,323 715,487 435,944 287,056 723,000 Gross profit 132,752 103,452 236,204 191,277 126,510 317,787 Operating expenses: Research and development 14,905 5,819 20,724 14,833 6,438 21,271 Selling, general, and administrative 45,304 34,047 79,351 47,981 32,717 80,698 Depreciation and amortization 28,314 35,112 63,426 35,360 35,156 70,516 Gain on insurance proceeds  (18,600 ) (18,600 )    Loss on disposal of fixed assets    72 288 360 Operating income $ 44,229 $ 47,074 91,303 $ 93,031 $ 51,911 144,942 Other expense (676 ) (2,220 ) Gain (loss) on extinguishment of debt 210 (79,921 ) Earnings of unconsolidated joint venture 261 257 Interest expense, net (38,280 ) (54,692 ) Income before income taxes $ 52,818 $ 8,366 The following table presents long-lived assets including goodwill and total assets. June 30, 2019 December 31, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) Property, plant, and equipment, net $ 545,998 $ 398,742 $ 944,740 $ 543,086 $ 398,390 $ 941,476 Investment in unconsolidated joint venture $ 11,852 $  $ 11,852 $ 12,070 $  $ 12,070 Goodwill $  $ 772,939 $ 772,939 $  $ 772,886 $ 772,886 Total assets $ 1,215,208 $ 1,793,497 $ 3,008,705 $ 1,160,029 $ 1,734,675 $ 2,894,704 For geographic reporting, revenue is attributed to the geographic location in which the customers facilities are located. Long-lived assets consist primarily of property, plant, and equipment, which are attributed to the geographic location in which they are located and are presented at historical cost. Following is a summary of revenue by geographic region: Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) (In thousands) Revenue: United States $ 104,178 $ 85,266 $ 189,444 $ 110,260 $ 81,231 $ 191,491 Germany 29,086 12,297 41,383 39,665 12,850 52,515 All other countries 164,597 99,856 264,453 188,225 106,164 294,389 $ 297,861 $ 197,419 $ 495,280 $ 338,150 $ 200,245 $ 538,395 Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Polymer Chemical Total Polymer Chemical Total (In thousands) (In thousands) Revenue: United States $ 192,146 $ 165,623 $ 357,769 $ 213,989 $ 162,555 $ 376,544 Germany 54,997 27,278 82,275 71,507 29,086 100,593 All other countries 311,773 199,874 511,647 341,725 221,925 563,650 $ 558,916 $ 392,775 $ 951,691 $ 627,221 $ 413,566 $ 1,040,787 Our capital expenditures for the Polymer segment, excluding capital expenditures by the KFPC joint venture, were $29.9 million and $19.5 million during the six months ended June 30, 2019 and 2018 , respectively, and capital expenditures for our Chemical segment were $20.1 million and $22.7 million during the six months ended June 30, 2019 and 2018 , respectively. Impact of Hurricane Michael During the six months ended June 30, 2019, we incurred an incremental $12.8 million of direct costs as we continued to ramp production back to operating capacity. Our insurance carrier provided an additional $17.5 million of advance reimbursement under our insurance policies, recorded as a gain on insurance proceeds in the Condensed Consolidated Statement of Operations (including $1.1 million of proceeds received during the fourth quarter of 2018, but which was deferred at that time as unearned until realizable, during the first quarter of 2019). The $18.6 million gain on insurance fully offsets the lost margin in the first quarter of 2019 and reimburses us for a portion of the direct costs we have incurred to date. We currently estimate the replacement cost associated with damaged equipment to be in a range of $9.0 million to $11.0 million . We have spent $5.6 million as of June 30, 2019. We continue to work with our insurance carriers to resolve all claims under our business interruption and property coverage.