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Quarterly Financial Information (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2019
Quarterly Financial Data [Abstract] |
Summary Of Quarterly Financial Data | The following table presents summarized quarterly financial data for 2019 and 2018:
|  | Quarter Ended
|  | March 31 |  | June 30 |  | September 30 |  | December 31
|  | (Amounts in thousands, except per share data)
2019 |  |  |  |  |  |  |  |
Net premiums earned |  | $ | 870,245 |  |  | $ | 888,776 |  |  | $ | 915,012 |  |  | $ | 925,384 |
Change in fair value of financial instruments pursuant to the fair value option |  | 104,227 |  |  | 50,281 |  |  | 24,021 |  |  | 18,173 |
Income before income taxes |  | 167,169 |  |  | 101,595 |  |  | 80,840 |  |  | 28,465 |
Net income |  | 135,867 |  |  | 83,250 |  |  | 69,282 |  |  | 31,688 |
Basic earnings per share |  | 2.46 |  |  | 1.50 |  |  | 1.25 |  |  | 0.57 |
Diluted earnings per share |  | 2.45 |  |  | 1.50 |  |  | 1.25 |  |  | 0.57 |
Dividends paid per share |  | 0.6275 |  |  | 0.6275 |  |  | 0.6275 |  |  | 0.6300 |
2018 |  |  |  |  |  |  |  |
Net premiums earned |  | $ | 808,084 |  |  | $ | 833,959 |  |  | $ | 858,135 |  |  | $ | 868,233 |
Change in fair value of financial instruments pursuant to the fair value option |  | (58,532 | ) |  | 8,793 |  |  | (12,907 | ) |  | (70,020 | )
(Loss) income before income taxes |  | (59,699 | ) |  | 73,246 |  |  | 70,286 |  |  | (114,448 | )
Net (loss) income |  | (42,607 | ) |  | 60,180 |  |  | 58,578 |  |  | (81,879 | )
Basic (loss) earnings per share |  | (0.77 | ) |  | 1.09 |  |  | 1.06 |  |  | (1.48 | )
Diluted (loss) earnings per share |  | (0.77 | ) |  | 1.09 |  |  | 1.06 |  |  | (1.48 | )
Dividends paid per share |  | 0.6250 |  |  | 0.6250 |  |  | 0.6250 |  |  | 0.6275 |

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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