The following tables present the underwriting results of the Company's reportable segments, as well as the carrying amounts of allocated goodwill and intangible assets: At and year ended December 31, 2018 Insurance Reinsurance Total Gross premiums written $ 3,797,592 $ 3,112,473 $ 6,910,065 Net premiums written 2,324,747 2,334,215 4,658,962 Net premiums earned 2,362,606 2,428,889 4,791,495 Other insurance related income 3,460 7,162 10,622 Net losses and loss expenses (1,494,323 ) (1,695,964 ) (3,190,287 ) Acquisition costs (399,193 ) (569,642 ) (968,835 ) General and administrative expenses (395,252 ) (123,916 ) (519,168 ) Underwriting income $ 77,298 $ 46,529 123,827 Corporate expenses (108,221 ) Net investment income 438,507 Net investment losses (150,218 ) Foreign exchange gains 29,165 Interest expense and financing costs (67,432 ) Transaction and reorganization expenses (66,940 ) Amortization of value of business acquired (172,332 ) Amortization of intangible assets (13,814 ) Income before income taxes and interest in income (loss) of equity method investments $ 12,542 Net loss and loss expense ratio 63.2 % 69.8 % 66.6 % Acquisition cost ratio 16.9 % 23.5 % 20.2 % General and administrative expense ratio 16.8 % 5.1 % 13.1 % Combined ratio 96.9 % 98.4 % 99.9 % Total intangible assets $ 379,285 $  $ 379,285 At and year ended December 31, 2017 Insurance Reinsurance Total Gross premiums written $ 2,814,918 $ 2,741,355 $ 5,556,273 Net premiums written 1,775,825 2,251,318 4,027,143 Net premiums earned 1,816,438 2,332,322 4,148,760 Other insurance related income (loss) 2,944 (4,184 ) (1,240 ) Net losses and loss expenses (1,465,427 ) (1,822,345 ) (3,287,772 ) Acquisition costs (270,229 ) (553,362 ) (823,591 ) General and administrative expenses (325,368 ) (124,115 ) (449,483 ) Underwriting loss $ (241,642 ) $ (171,684 ) (413,326 ) Corporate expenses (129,945 ) Net investment income 400,805 Net investment gains 28,226 Foreign exchange losses (134,737 ) Interest expense and financing costs (54,811 ) Bargain purchase gain 15,044 Transaction and reorganization expenses (26,718 ) Amortization of value of business acquired (50,104 ) Amortization of intangible assets (2,543 ) Loss before income taxes and interest in income (loss) of equity method investments $ (368,109 ) Net loss and loss expense ratio 80.7 % 78.1 % 79.2 % Acquisition cost ratio 14.9 % 23.7 % 19.9 % General and administrative expense ratio 17.9 % 5.3 % 14.0 % Combined ratio 113.5 % 107.1 % 113.1 % Total intangible assets $ 566,828 $  $ 566,828 At and year ended December 31, 2016 Insurance Reinsurance Total Gross premiums written $ 2,432,475 $ 2,537,733 $ 4,970,208 Net premiums written 1,519,559 2,233,415 3,752,974 Net premiums earned 1,534,282 2,171,343 3,705,625 Other insurance related income 89 7,133 7,222 Net losses and loss expenses (977,771 ) (1,226,426 ) (2,204,197 ) Acquisition costs (206,619 ) (540,257 ) (746,876 ) General and administrative expenses (327,351 ) (155,350 ) (482,701 ) Underwriting income $ 22,630 $ 256,443 279,073 Corporate expenses (120,016 ) Net investment income 353,335 Net investment losses (60,525 ) Foreign exchange gains 121,295 Interest expense and financing costs (51,360 ) Income before income taxes and interest in income (loss) of equity method investments $ 521,802 Net loss and loss expense ratio 63.7 % 56.5 % 59.5 % Acquisition cost ratio 13.5 % 24.9 % 20.2 % General and administrative expense ratio 21.3 % 7.1 % 16.2 % Combined ratio 98.5 % 88.5 % 95.9 % Total intangible assets $ 85,049 $  $ 85,049