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CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Revenues: |  |  |  |
Net premiums | $ 2,489,797 | $ 2,251,758 | $ 7,335,944 | $ 6,755,708
Investment income, net of related expenses | 556,918 | 489,727 | 1,589,820 | 1,414,659
Investment related gains (losses), net: |  |  |  |
Other-than-temporary impairments on fixed maturity securities | (390) | 0 | (20,980) | (34,663)
Other investment related gains (losses), net | 23,043 | 86,624 | 160,451 | 118,665
Total investment related gains (losses), net | 22,653 | 86,624 | 139,471 | 84,002
Other revenues | 75,942 | 72,468 | 218,091 | 197,844
Total revenues | 3,145,310 | 2,900,577 | 9,283,326 | 8,452,213
Benefits and Expenses: |  |  |  |
Claims and other policy benefits | 2,100,680 | 1,993,064 | 6,371,188 | 5,877,330
Interest credited | 126,099 | 116,848 | 349,068 | 300,602
Policy acquisition costs and other insurance expenses | 365,424 | 300,962 | 1,064,645 | 940,406
Other operating expenses | 168,417 | 152,556 | 481,279 | 469,875
Interest expense | 36,836 | 43,063 | 108,590 | 96,201
Collateral finance and securitization expense | 7,692 | 6,484 | 21,235 | 19,396
Total benefits and expenses | 2,805,148 | 2,612,977 | 8,396,005 | 7,703,810
Income before income taxes | 340,162 | 287,600 | 887,321 | 748,403
Provision for income taxes | 112,571 | 88,881 | 282,028 | 237,109
Net income | $ 227,591 | $ 198,719 | $ 605,293 | $ 511,294
Earnings per share: |  |  |  |
Basic earnings per share | $ 3.53 | $ 3.10 | $ 9.39 | $ 7.95
Diluted earnings per share | 3.47 | 3.07 | 9.23 | 7.87
Dividends declared per share | $ 0.50 | $ 0.41 | $ 1.32 | $ 1.15

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