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CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Revenues |  |  |
Net premiums | $ 8,254,027 | $ 7,906,596 | $ 7,335,687
Investment income, net of related expenses | 1,699,865 | 1,436,206 | 1,281,197
Investment related gains (losses), net: |  |  |
Other-than-temporary impairments on fixed maturity securities | (12,654) | (15,908) | (30,873)
Other-than-temporary impairments on fixed maturity securities transferred to (from) accumulated other comprehensive income | (247) | (7,618) | 3,924
Other investment related gains (losses), net | 76,891 | 277,662 | (9,107)
Total investment related gains (losses), net | 63,990 | 254,136 | (36,056)
Other revenues | 300,471 | 243,973 | 248,710
Total revenues | 10,318,353 | 9,840,911 | 8,829,538
Benefits and expenses |  |  |
Claims and other policy benefits | 7,304,332 | 6,665,999 | 6,225,183
Interest credited | 476,514 | 379,915 | 316,394
Policy acquisition costs and other insurance expenses | 1,300,780 | 1,306,470 | 990,021
Other operating expenses | 466,717 | 451,759 | 419,340
Interest expense | 124,307 | 105,348 | 102,638
Collateral finance facility expense | 10,449 | 12,197 | 12,391
Total benefits and expenses | 9,683,099 | 8,921,688 | 8,065,967
Income before income taxes | 635,254 | 919,223 | 763,571
Provision for income taxes | 216,417 | 287,330 | 217,526
Net income | $ 418,837 | $ 631,893 | $ 546,045
Earnings per share |  |  |
Basic earnings per share (in dollars per share) | $ 5.82 | $ 8.57 | $ 7.42
Diluted earnings per share (in dollars per share) | $ 5.78 | $ 8.52 | $ 7.37
Dividends declared per share | $ 1.08 | $ 0.84 | $ 0.60

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