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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Premiums written: |  |
Direct | $ 270,034 | $ 265,823
Assumed | 92 | 1,288
Ceded | (33,220) | (30,409)
Net premiums written | 236,906 | 236,702
Increase in unearned premiums, net | (4,799) | (7,599)
Net premiums earned | 232,107 | 229,103
Investment income, net of expenses | 32,121 | 29,477
Net realized investment losses | (329) | (125)
Other revenue | 1,871 | 2,425
Total revenues | 265,770 | 260,880
Losses and expenses: |  |
Losses incurred, net | 23,850 | 27,619
Amortization of deferred policy acquisition costs | 2,572 | 2,230
Other underwriting and operating expenses, net | 46,090 | 40,765
Interest expense | 13,233 | 16,309
Total losses and expenses | 85,745 | 86,923
Income before tax | 180,025 | 173,957
Provision for income taxes | 36,388 | 84,159
Net income | $ 143,637 | $ 89,798
Earnings per share: |  |
Basic (in dollars per share) | $ 0.39 | $ 0.26
Diluted (in dollars per share) | $ 0.38 | $ 0.24
Weighted average common shares outstanding - basic (in shares) | 370,908 | 341,009
Weighted average common shares outstanding - diluted (in shares) | 391,562 | 402,175

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