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Investments (Details 5) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Net unrealized investment gains and losses |  |  |
Reclassification of net realized investment (gains) losses to net income | [1],[2] | $ 203 | $ (481)
Fixed Maturity Securities [Member] |  |  |
Net unrealized investment gains and losses |  |  |
Beginning of period |  | 197,978 | 198,714
Change in net unrealized investment gains and losses |  | 21,891 | 78,341
Reclassification of net realized investment (gains) losses to net income |  | (484) | (674)
End of period |  | 219,385 | 276,381
Equity securities [Member] |  |  |
Net unrealized investment gains and losses |  |  |
Beginning of period |  | 4,963 | 2,649
Change in net unrealized investment gains and losses |  | 3,302 | 2,188
Reclassification of net realized investment (gains) losses to net income |  | 687 | 193
End of period |  | $ 8,952 | $ 5,030
[1] | All amounts are net of tax.
[2] | The pretax amounts reclassified from accumulated other comprehensive income (loss), $(313) and $740, are included in net realized investment gains and losses and the related income tax expenses, $(110) and $259, are included in income tax expense in the Consolidated Statements of Operations for the three months ended March 31, 2017 and 2016, 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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