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CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Revenues |  |  |  |
Net premiums earned | $ 981,431 | $ 946,990 | $ 1,920,133 | $ 1,849,331
Net investment income | 106,063 | 91,730 | 204,728 | 140,896
Other insurance related income (losses) | 2,560 | (892) | (1,222) | (1,094)
Bargain purchase gain | 15,044 | 0 | 15,044 | 0
Net realized investment gains (losses): |  |  |  |
Other-than-temporary impairment (OTTI) losses | (1,528) | (6,369) | (8,082) | (16,099)
Other realized investment gains (losses) | (2,864) | 27,379 | (21,361) | (29,401)
Total net realized investment gains (losses) | (4,392) | 21,010 | (29,443) | (45,500)
Total revenues | 1,100,706 | 1,058,838 | 2,109,240 | 1,943,633
Expenses |  |  |  |
Net losses and loss expenses | 605,332 | 632,294 | 1,212,273 | 1,131,256
Acquisition costs | 204,361 | 189,125 | 394,153 | 369,761
General and administrative expenses | 147,816 | 146,746 | 309,075 | 296,648
Foreign exchange losses (gains) | 36,118 | (56,602) | 57,583 | (55,986)
Interest expense and financing costs | 12,751 | 12,914 | 25,543 | 25,747
Total expenses | 1,006,378 | 924,477 | 1,998,627 | 1,767,426
Income before income taxes and interest in income (loss) of equity method investments | 94,328 | 134,361 | 110,613 | 176,207
Income tax (expense) benefit | 3,333 | (4,901) | 12,670 | 1,639
Interest in loss of equity method investments | (1,975) | 0 | (7,741) | 0
Net income | 95,686 | 129,460 | 115,542 | 177,846
Preferred share dividends | 10,656 | 9,969 | 25,497 | 19,938
Net income available to common shareholders | $ 85,030 | $ 119,491 | $ 90,045 | $ 157,908
Net income per common share: |  |  |  |
Basic net income (in usd per share) | $ 1.01 | $ 1.30 | $ 1.06 | $ 1.70
Diluted net income (in usd per share) | $ 1.01 | $ 1.29 | $ 1.05 | $ 1.69
Weighted average number of common shares outstanding - basic (in shares) | 84,141 | 91,926 | 85,076 | 92,980
Weighted average number of common shares outstanding - diluted (in shares) | 84,511 | 92,558 | 85,647 | 93,705
Cash dividends declared per common share (in usd per share) | $ 0.38 | $ 0.35 | $ 0.76 | $ 0.70

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1505-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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