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Quarterly Financial Information (Tables) | 12 Months Ended
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Dec. 31, 2012
Quarterly Financial Data [Abstract] |
Summary Of Quarterly Financial Data | Summarized quarterly financial data for 2012 and 2011 are as follows:
| Quarter Ended |
| March 31 |  | June 30 |  | September 30 |  | December 31 |
| (Amounts in thousands, except per share data) |
2012 |  |  |  |  |  |  |  |
Net premiums earned | $ | 635,812 |  |  | $ | 637,247 |  |  | $ | 646,084 |  |  | $ | 655,777 |  |
Change in fair value of investments pursuant to the fair value option | $ | 49,343 |  |  | $ | (24,788 | ) |  | $ | 44,783 |  |  | $ | (23,829 | ) |
Income (loss) before income taxes | $ | 101,994 |  |  | $ | (18,853 | ) |  | $ | 91,330 |  |  | $ | (39,161 | ) |
Net income (loss) | $ | 73,356 |  |  | $ | (5,264 | ) |  | $ | 66,201 |  |  | $ | (17,382 | ) |
Basic earnings per share | $ | 1.34 |  |  | $ | (0.10 | ) |  | $ | 1.21 |  |  | $ | (0.32 | ) |
Diluted earnings per share | $ | 1.34 |  |  | $ | (0.10 | ) | (1) | $ | 1.21 |  |  | $ | (0.32 | ) | (1)
Dividends paid per share | $ | 0.61 |  |  | $ | 0.61 |  |  | $ | 0.61 |  |  | $ | 0.6125 |  |
2011 |  |  |  |  |  |  |  |
Net premiums earned | $ | 638,487 |  |  | $ | 642,331 |  |  | $ | 643,626 |  |  | $ | 641,613 |  |
Change in fair value of investments pursuant to the fair value option | $ | 20,904 |  |  | $ | 20,597 |  |  | $ | (64,312 | ) |  | $ | 54,100 |  |
Income (loss) before income taxes | $ | 76,911 |  |  | $ | 75,613 |  |  | $ | (18,118 | ) |  | $ | 110,693 |  |
Net income (loss) | $ | 58,226 |  |  | $ | 57,251 |  |  | $ | (3,782 | ) |  | $ | 79,469 |  |
Basic earnings per share | $ | 1.06 |  |  | $ | 1.04 |  |  | $ | (0.07 | ) |  | $ | 1.45 |  |
Diluted earnings per share | $ | 1.06 |  |  | $ | 1.04 |  |  | $ | (0.07 | ) | (1) | $ | 1.45 |  |
Dividends paid per share | $ | 0.60 |  |  | $ | 0.60 |  |  | $ | 0.60 |  |  | $ | 0.61 |  |
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(1) | The dilutive impact of incremental shares is excluded from loss position in accordance with GAAP.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and 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=20225539&loc=d3e1280-108306 + Details
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