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CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Revenues |  |  |  |
Net premiums earned | $ 1,156,941 | $ 1,104,003 | $ 2,260,663 | $ 2,192,628
Net investment income | 104,672 | 45,040 | 218,836 | 138,140
Other insurance related income (loss) | 5,817 | 1,996 | 8,598 | (6,710)
Net investment gains (losses): |  |  |  |
Allowance for expected credit losses | 150 | 13,761 | 239 | (6,257)
Impairment losses | 0 | (112) | 0 | (1,302)
Other realized and unrealized investment gains (losses) | 73,143 | 39,394 | 102,697 | (2,272)
Total net investment gains (losses) | 73,293 | 53,043 | 102,936 | (9,831)
Total revenues | 1,340,723 | 1,204,082 | 2,591,033 | 2,314,227
Expenses |  |  |  |
Net losses and loss expenses | 666,473 | 676,261 | 1,381,190 | 1,584,335
Acquisition costs | 219,070 | 228,502 | 437,941 | 467,152
General and administrative expenses | 162,452 | 140,652 | 320,860 | 297,712
Foreign exchange losses (gains) | 19,602 | 9,709 | 23,716 | (51,974)
Interest expense and financing costs | 15,235 | 20,595 | 30,806 | 44,067
Reorganization expenses | 0 | 392 | 0 | (591)
Amortization of value of business acquired | 1,028 | 1,285 | 2,056 | 3,083
Amortization of intangible assets | 3,324 | 2,855 | 6,013 | 5,725
Total expenses | 1,087,184 | 1,080,251 | 2,202,582 | 2,349,509
Income (loss) before income taxes and interest in income (loss) of equity method investments | 253,539 | 123,831 | 388,451 | (35,282)
Income tax expense | (27,865) | (10,893) | (48,641) | (6,026)
Interest in income (loss) of equity method investments | 9,799 | 7,102 | 18,960 | (16,475)
Net income (loss) | 235,473 | 120,040 | 358,770 | (57,783)
Preferred share dividends | 7,563 | 7,563 | 15,125 | 15,125
Net income (loss) available (attributable) to common shareholders | $ 227,910 | $ 112,477 | $ 343,645 | $ (72,908)
Earnings (loss) per common share: |  |  |  |
Earnings (loss) per common share (in usd per share) | $ 2.69 | $ 1.33 | $ 4.06 | $ (0.87)
Earnings (loss) per diluted common share (in usd per share) | $ 2.67 | $ 1.33 | $ 4.04 | $ (0.87)
Weighted average common shares outstanding (in shares) | 84,764 | 84,303 | 84,640 | 84,198
Weighted average diluted common shares outstanding (in shares) | 85,267 | 84,600 | 85,117 | 84,198

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- Definition The adjustment that represents the periodic charge against earnings to reduce the value of business acquired (VOBA) over the expected life of the underlying insurance contracts. VOBA reflects the estimated fair value of a life insurance business in force and represents the portion of the cost to acquire the business that is allocated to the value of the right to receive future cash flows from insurance contracts existing at the date of acquisition. Such value is the present value of the actuarially determined projected cash flows for the acquired policies. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section S99 -Paragraph 2 -Subparagraph (2) -URI http://asc.fasb.org/extlink&oid=122135039&loc=d3e569990-122904 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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