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CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Revenues: |  |  |  |
Net premiums | $ 2,809,641 | $ 2,562,042 | $ 8,311,240 | $ 7,739,053
Investment income, net of related expenses | 678,805 | 572,742 | 1,842,760 | 1,617,132
Investment related gains (losses), net: |  |  |  |
Other-than-temporary impairments on fixed maturity securities | (8,539) | (10,705) | (17,992) | (14,055)
Other investment related gains (losses), net | 57,323 | (9,312) | 87,036 | (17,004)
Total investment related gains (losses), net | 48,784 | (20,017) | 69,044 | (31,059)
Other revenues | 90,335 | 112,764 | 291,960 | 272,020
Total revenues | 3,627,565 | 3,227,531 | 10,515,004 | 9,597,146
Benefits and Expenses: |  |  |  |
Claims and other policy benefits | 2,469,981 | 2,209,920 | 7,493,516 | 6,851,614
Interest credited | 226,262 | 143,292 | 517,293 | 333,068
Policy acquisition costs and other insurance expenses | 321,855 | 310,639 | 894,081 | 987,817
Other operating expenses | 209,348 | 200,262 | 634,330 | 586,495
Interest expense | 45,927 | 33,290 | 129,383 | 107,769
Collateral finance and securitization expense | 7,102 | 7,467 | 22,670 | 22,509
Total benefits and expenses | 3,280,475 | 2,904,870 | 9,691,273 | 8,889,272
Income before income taxes | 347,090 | 322,661 | 823,731 | 707,874
Provision for income taxes | 84,325 | 21,462 | 188,761 | 102,071
Net income | $ 262,765 | $ 301,199 | $ 634,970 | $ 605,803
Earnings per share: |  |  |  |
Basic earnings per share | $ 4.19 | $ 4.76 | $ 10.13 | $ 9.47
Diluted earnings per share | $ 4.12 | $ 4.68 | $ 9.93 | $ 9.30

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