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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Revenues |  |  |  |
Net premiums earned | $ 83,249 | $ 61,615 | $ 157,118 | $ 116,529
Net investment income | 7,629 | 5,735 | 15,012 | 10,309
Net realized investment (losses) gains | (113) | 59 | (300) | 59
Other revenues | 415 | 44 | 456 | 108
Total revenues | 91,180 | 67,453 | 172,286 | 127,005
Expenses |  |  |  |
Insurance claims and claim expenses | 2,923 | 643 | 5,666 | 2,212
Underwriting and operating expenses | 32,543 | 29,020 | 63,392 | 57,473
Total expenses | 35,466 | 29,663 | 69,058 | 59,685
Other expense |  |  |  |
(Loss) gain from change in fair value of warrant liability | (1,685) | 109 | (7,164) | 529
Interest expense | (3,071) | (5,560) | (6,132) | (8,979)
Total other expense | (4,756) | (5,451) | (13,296) | (8,450)
Income before income taxes | 50,958 | 32,339 | 89,932 | 58,870
Income tax expense | 11,858 | 7,098 | 17,933 | 11,274
Net income | $ 39,100 | $ 25,241 | $ 71,999 | $ 47,596
Earnings per share |  |  |  |
Basic earnings per share (in dollars per share) | $ 0.58 | $ 0.38 | $ 1.07 | $ 0.74
Diluted earnings per share (in dollars per share) | $ 0.56 | $ 0.37 | $ 1.04 | $ 0.70
Weighted average common shares outstanding |  |  |  |
Basic weighted average shares outstanding (in shares) | 67,590 | 65,664 | 67,143 | 63,891
Dilutive weighted average shares outstanding (in shares) | 69,590 | 68,616 | 69,348 | 67,171
Comprehensive income: |  |  |  |
Net income | $ 39,100 | $ 25,241 | $ 71,999 | $ 47,596
Other comprehensive income (loss), net of tax: |  |  |  |
Unrealized gains (losses) in accumulated other comprehensive income, net of tax expense (benefit) of $3,662 and ($2,879) for the three months ended June 30, 2019 and 2018 and $7,615 and ($3,304) for the six months ended June 30, 2019 and 2018, respectively | 13,779 | (1,464) | 28,647 | (12,429)
Reclassification adjustment for realized losses (gains) included in net income, net of tax (benefit) expense of ($24) and $12 for the three months ended June 30, 2019 and 2018 and ($63) and $10 for the six months ended June 30, 2019 and 2018, respectively | 89 | (46) | 237 | (37)
Other comprehensive income (loss), net of tax | 13,868 | (1,510) | 28,884 | (12,466)
Comprehensive income | $ 52,968 | $ 23,731 | $ 100,883 | $ 35,130

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