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Investments (Details 5) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Net unrealized investment gains (losses) on fixed maturity securities, net of tax |  |  |
Reclassification of net realized investment (gains) losses to net income | [1],[2] | $ (481) | $ (3,792)
Fixed Maturity Securities [Member] |  |  |
Net unrealized investment gains (losses) on fixed maturity securities, net of tax |  |  |
Beginning of period |  | 198,714 | 336,604
Change in unrealized investment gains and losses |  | 78,341 | 45,486
Reclassification of net realized investment (gains) losses to net income |  | (674) | (846)
End of period |  | 276,381 | 381,244
Equity securities [Member] |  |  |
Net unrealized investment gains (losses) on fixed maturity securities, net of tax |  |  |
Beginning of period |  | 2,649 | 6,988
Change in unrealized investment gains and losses |  | 2,188 | (658)
Reclassification of net realized investment (gains) losses to net income |  | 193 | (2,946)
End of period |  | $ 5,030 | $ 3,384
[1] | All amounts are net of tax.
[2] | The pretax amounts reclassified from accumulated other comprehensive income (loss), $740 and $5,834, are included in net realized investment gains and losses and the related tax expenses, $259 and $2,042, are included in income tax expense in the Consolidated Statements of Operations for the three months ended March 31, 2016 and 2015, respectively.

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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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