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Quarterly Results for 2016 and 2015 (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Summary of Quarterly Results for the Periods Presented | The following table provides a summary of quarterly results for the periods presented (in thousands except per share data):
|  | First |  |  | Second |  |  | Third |  |  | Fourth |
|  | Quarter |  |  | Quarter |  |  | Quarter |  |  | Quarter |
For the Year Ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums earned, net |  | $ | 161,559 |  |  | $ | 169,009 |  |  | $ | 174,517 |  |  | $ | 183,708 |
Investment income |  |  | 2,704 |  |  |  | 3,223 |  |  |  | 3,085 |  |  |  | 4,448 |
Total revenues |  |  | 174,874 |  |  |  | 185,487 |  |  |  | 190,243 |  |  |  | 201,312 |
Total expenses |  |  | 127,503 |  |  |  | 137,564 |  |  |  | 173,644 |  |  |  | 142,721 |
Net income |  |  | 31,199 |  |  |  | 29,376 |  |  |  | 9,964 |  |  |  | 36,396 |
Basic earnings per share |  | $ | 0.89 |  |  | $ | 0.84 |  |  | $ | 0.29 |  |  | $ | 1.05 |
Diluted earnings per share |  | $ | 0.86 |  |  | $ | 0.82 |  |  | $ | 0.28 |  |  | $ | 1.03 |
For the Year Ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums earned, net |  | $ | 152,448 |  |  | $ | 156,461 |  |  | $ | 159,534 |  |  | $ | 163,973 |
Investment income |  |  | 1,605 |  |  |  | 2,142 |  |  |  | 2,304 |  |  |  | 3,489 |
Total revenues |  |  | 164,446 |  |  |  | 169,802 |  |  |  | 172,436 |  |  |  | 178,605 |
Total expenses |  |  | 123,347 |  |  |  | 114,908 |  |  |  | 128,273 |  |  |  | 155,878 |
Net income |  |  | 25,226 |  |  |  | 33,647 |  |  |  | 26,882 |  |  |  | 13,655 |
Basic earnings per share |  | $ | 0.73 |  |  | $ | 0.96 |  |  | $ | 0.77 |  |  | $ | 0.39 |
Diluted earnings per share |  | $ | 0.71 |  |  | $ | 0.94 |  |  | $ | 0.75 |  |  | $ | 0.38 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=84173487&loc=d3e1280-108306 + Details
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