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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Premiums written: |  |  |  |
Direct | $ 280,229 | $ 287,918 | $ 824,989 | $ 828,986
Assumed | (3,020) | (91) | (843) | 1,882
Ceded | (25,326) | (31,931) | (79,921) | (92,436)
Net premiums written | 251,883 | 255,896 | 744,225 | 738,432
Increase in unearned premiums, net | (1,457) | (18,813) | (14,728) | (41,110)
Net premiums earned | 250,426 | 237,083 | 729,497 | 697,322
Investment income, net of expenses | 36,380 | 30,402 | 103,003 | 89,595
Net realized investment gains (losses) | 1,114 | (50) | (1,112) | (227)
Other revenue | 2,525 | 2,925 | 6,827 | 7,862
Total revenues | 290,445 | 270,360 | 838,215 | 794,552
Losses and expenses: |  |  |  |
Losses incurred, net | (1,518) | 29,747 | 8,877 | 84,705
Amortization of deferred policy acquisition costs | 3,156 | 2,985 | 8,573 | 7,799
Other underwriting and operating expenses, net | 43,655 | 39,888 | 131,587 | 119,164
Interest expense | 13,258 | 13,273 | 39,737 | 43,779
Loss on debt extinguishment | 0 | 0 | 0 | 65
Total losses and expenses | 58,551 | 85,893 | 188,774 | 255,512
Income before tax | 231,894 | 184,467 | 649,441 | 539,040
Provision for income taxes | 49,994 | 64,440 | 137,090 | 210,593
Net income | $ 181,900 | $ 120,027 | $ 512,351 | $ 328,447
Earnings per share: |  |  |  |
Basic (in dollars per share) | $ 0.50 | $ 0.32 | $ 1.40 | $ 0.91
Diluted (in dollars per share) | $ 0.49 | $ 0.32 | $ 1.36 | $ 0.86
Weighted average common shares outstanding - basic (in shares) | 362,180 | 370,586 | 367,190 | 359,613
Weighted average common shares outstanding - diluted (in shares) | 382,905 | 391,087 | 387,765 | 395,870

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