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Investments (Details 7) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Net unrealized investment gains and losses on fixed maturity securities, net of tax |  |  |  |
Reclassification of net realized investment (gains) losses to net income | [1],[2] | $ 3,364 | $ 7,584 | $ 7,113
Fixed Maturity Securities [Member] |  |  |  |
Net unrealized investment gains and losses on fixed maturity securities, net of tax |  |  |  |
Beginning of period |  | 198,714 | 336,604 | 146,489
Change in unrealized investment gains and losses |  | 3,024 | (131,202) | 195,413
Reclassification of net realized investment (gains) losses to net income |  | (3,760) | (6,688) | (5,298)
End of period |  | 197,978 | 198,714 | 336,604
Equity securities [Member] |  |  |  |
Net unrealized investment gains and losses on fixed maturity securities, net of tax |  |  |  |
Beginning of period |  | 2,649 | 6,988 | 4,618
Change in unrealized investment gains and losses |  | 1,919 | (3,443) | 4,185
Reclassification of net realized investment (gains) losses to net income |  | 395 | (896) | (1,815)
End of period |  | $ 4,963 | $ 2,649 | $ 6,988
[1] | All amounts are net of tax.
[2] | The pretax amounts reclassified from accumulated other comprehensive income, $5,176, $11,667 and $10,943, are included in net realized investment gains and losses and the related tax expenses, $1,812, $4,083 and $3,830, are included in income tax expense in the Consolidated Statements of Operations for the years ended December 31, 2016, 2015 and 2014, respectively.

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