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Investments (Details 7) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Reconciliation of net unrealized investment gains (losses) on fixed maturity securities and equity securities |  |  |  |
Reclassification of net realized investment (gains) losses to net income | $ (14,459) | [1],[2] |  |
Fixed Maturity Securities [Member] |  |  |  |
Reconciliation of net unrealized investment gains (losses) on fixed maturity securities and equity securities |  |  |  |
Beginning of period | 423,004 |  | 284,338 | 118,498
Change in unrealized investment gains and losses | (264,503) |  | 153,758 | 190,193
Reclassification of net realized investment (gains) losses to net income | (12,012) |  | (15,092) | (24,353)
End of period | 146,489 |  | 423,004 | 284,338
Equity Securities [Member] |  |  |  |
Reconciliation of net unrealized investment gains (losses) on fixed maturity securities and equity securities |  |  |  |
Beginning of period | 720 |  | 2,408 | 2,139
Change in unrealized investment gains and losses | 6,345 |  | 964 | 397
Reclassification of net realized investment (gains) losses to net income | (2,447) |  | (2,652) | (128)
End of period | $ 4,618 |  | $ 720 | $ 2,408
[1] | All amounts are net of tax.
[2] | The $22,245 pretax amount reclassified from accumulated other comprehensive income is included in net realized investment gains and losses and the $7,786 related tax expense (benefit) is included in income tax expense in the Consolidated Statement of Operations for the year ended December 31, 2013.

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- Definition Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period before the impact of deferred policy acquisition costs. + References No definition available. + Details
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- Definition The change in unrealized holding gain (loss), net of tax, on available-for-sale securities included in a separate component of shareholders' equity during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e689-108580 + Details
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