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Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2012
Quarterly Financial Data [Abstract] |
Unaudited quarterly financial data |
|  | Three Months Ended |
| March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |
|  | (In thousands, except per share amounts) |
2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums earned |  | $ | 69,790 |  |  | $ | 69,733 |  |  | $ | 72,425 |  |  | $ | 78,741 |
Net investment income |  |  | 6,914 |  |  |  | 6,605 |  |  |  | 6,801 |  |  |  | 6,698 |
Net realized gains on investments |  |  | 1,791 |  |  |  | 137 |  |  |  | 985 |  |  |  | 66 |
Total revenues |  |  | 78,654 |  |  |  | 76,637 |  |  |  | 80,374 |  |  |  | 85,583 |
Income before income taxes |  |  | 11,433 |  |  |  | 4,033 |  |  |  | 9,003 |  |  |  | 12,674 |
Net income |  |  | 9,561 |  |  |  | 3,445 |  |  |  | 7,121 |  |  |  | 9,226 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 0.53 |  |  |  | 0.19 |  |  |  | 0.39 |  |  |  | 0.51 |
Diluted |  |  | 0.52 |  |  |  | 0.19 |  |  |  | 0.38 |  |  |  | 0.50 |
Comprehensive income |  |  | 9,508 |  |  |  | 3,948 |  |  |  | 8,570 |  |  |  | 8,091 |
2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Premiums earned |  | $ | 60,089 |  |  | $ | 60,261 |  |  | $ | 64,454 |  |  | $ | 66,211 |
Net investment income |  |  | 6,546 |  |  |  | 6,597 |  |  |  | 6,495 |  |  |  | 6,702 |
Net realized gains on investments |  |  | 103 |  |  |  | 145 |  |  |  | 512 |  |  |  | 1,468 |
Total revenues |  |  | 66,959 |  |  |  | 67,051 |  |  |  | 71,743 |  |  |  | 74,910 |
Income before income taxes |  |  | 7,490 |  |  |  | 4,832 |  |  |  | 5,518 |  |  |  | 9,517 |
Net income |  |  | 6,630 |  |  |  | 4,594 |  |  |  | 4,884 |  |  |  | 8,073 |
Earnings per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 0.36 |  |  |  | 0.25 |  |  |  | 0.27 |  |  |  | 0.45 |
Diluted |  |  | 0.35 |  |  |  | 0.24 |  |  |  | 0.26 |  |  |  | 0.44 |
Comprehensive income |  |  | 6,537 |  |  |  | 5,386 |  |  |  | 6,162 |  |  |  | 8,046 |

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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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