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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Premiums written: |  |  |
Direct | $ 1,124,196 | $ 1,103,332 | $ 1,121,776
Assumed | 6,446 | 271 | 1,905
Ceded | (129,334) | (111,341) | (125,726)
Net premiums written | 1,001,308 | 992,262 | 997,955
Decrease (increase) in unearned premiums | 29,680 | (17,100) | (63,208)
Net premiums earned | 1,030,988 | 975,162 | 934,747
Investment income, net of expenses | 167,045 | 141,331 | 120,871
Net realized investment gains (losses) | 5,306 | (1,353) | 231
Other revenue | 10,638 | 8,708 | 10,205
Total revenues | 1,213,977 | 1,123,848 | 1,066,054
Losses and expenses: |  |  |
Losses incurred, net | 118,575 | 36,562 | 53,709
Amortization of deferred policy acquisition costs | 12,001 | 11,932 | 11,111
Other underwriting and operating expenses, net | 182,768 | 178,211 | 159,638
Interest expense | 52,656 | 52,993 | 57,035
Loss on debt extinguishment | 0 | 0 | 65
Total losses and expenses | 366,000 | 279,698 | 281,558
Income before tax | 847,977 | 844,150 | 784,496
Provision for income taxes | 174,214 | 174,053 | 428,735
Net income | $ 673,763 | $ 670,097 | $ 355,761
Earnings per share: |  |  |
Basic (in dollars per share) | $ 1.91 | $ 1.83 | $ 0.98
Diluted (in dollars per share) | $ 1.85 | $ 1.78 | $ 0.95
Weighted average common shares outstanding - basic (in shares) | 352,827 | 365,406 | 362,380
Weighted average common shares outstanding - diluted (in shares) | 373,924 | 386,078 | 394,766

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