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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Revenues |  |
Net premiums earned | $ 902,340 | $ 904,053
Net investment income | 49,164 | 92,107
Other insurance related income (losses) | (203) | 7,676
Net realized investment losses: |  |
Other-than-temporary impairment (OTTI) losses | (9,729) | (17,568)
Other realized investment losses | (56,779) | (24,985)
Total net realized investment losses | (66,508) | (42,553)
Total revenues | 884,793 | 961,283
Expenses |  |
Net losses and loss expenses | 498,962 | 512,328
Acquisition costs | 180,635 | 171,542
General and administrative expenses | 149,901 | 163,241
Foreign exchange losses (gains) | 616 | (63,220)
Interest expense and financing costs | 12,833 | 12,257
Total expenses | 842,947 | 796,148
Income before income taxes | 41,846 | 165,135
Income tax benefit | (6,540) | (690)
Net income | 48,386 | 165,825
Preferred share dividends | 9,969 | 10,022
Net income available to common shareholders | $ 38,417 | $ 155,803
Net income per common share: |  |
Basic net income | $ 0.41 | $ 1.56
Diluted net income | $ 0.41 | $ 1.54
Weighted average number of common shares outstanding - basic | 94,035 | 99,910
Weighted average number of common shares outstanding - diluted | 94,853 | 101,139
Cash dividends declared per common share | $ 0.35 | $ 0.29

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