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Investments (Details 3) $ in Thousands | Dec. 31, 2016 USD ($) Number | Dec. 31, 2015 USD ($) Number
--- | --- | ---
Fixed maturity securities, Fair Value |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | $ 1,994,925 | $ 2,304,060 |
Fixed maturity securities, Fair Value, More than 12 Months | 307,486 | 224,513 |
Fixed maturity securities, Fair Value, Total | 2,302,411 | 2,528,573 |
Fixed maturity securities, Gross Unrealized Losses |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 61,692 | 74,011 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 14,292 | 19,842 |
Fixed maturity securities, Gross Unrealized Losses, Total | $ 75,984 | $ 93,853 |
Number of positions with a gross unrealized loss position, 12 Months or Less | Number | 629 | 684 |
Number of position with a gross unrealized loss position, more than 12 months | Number | 102 | 78 |
Number of position with a gross unrealized loss position, Total | Number | 731 | 762 |
Fair value as a percentage of total fixed maturities and equity securities fair value, 12 Months or Less | 26.30% | 32.00% |
Fair value as a percentage of total fixed maturities and equity securities fair value, more than 12 months | 4.00% | 3.10% |
Fair value as a percentage of total fixed maturities and equity securities fair value, Total | 30.30% | 35.10% |
Mortgage-backed securities [Member] |  |  |
Fixed maturity securities, Fair Value |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | $ 76,573 | $ 48,097 |
Fixed maturity securities, Fair Value, More than 12 Months | 3,235 | 1,595 |
Fixed maturity securities, Fair Value, Total | 79,808 | 49,692 |
Fixed maturity securities, Gross Unrealized Losses |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 3,096 | 1,748 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 544 | 113 |
Fixed maturity securities, Gross Unrealized Losses, Total | 3,640 | 1,861 |
Other [Member] |  |  |
Fixed maturity securities, Fair Value |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 219,372 | 248,478 |
Fixed maturity securities, Fair Value, More than 12 Months | 0 | 1,921 |
Fixed maturity securities, Fair Value, Total | 219,372 | 250,399 |
Fixed maturity securities, Gross Unrealized Losses |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 10,120 | 7,338 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 0 | 77 |
Fixed maturity securities, Gross Unrealized Losses, Total | 10,120 | 7,415 |
Municipal bonds [Member] |  |  |
Fixed maturity securities, Fair Value |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 408,163 | 168,939 |
Fixed maturity securities, Fair Value, More than 12 Months | 9,928 | 21,717 |
Fixed maturity securities, Fair Value, Total | 418,091 | 190,656 |
Fixed maturity securities, Gross Unrealized Losses |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 19,006 | 5,382 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 3,582 | 4,958 |
Fixed maturity securities, Gross Unrealized Losses, Total | 22,588 | 10,340 |
Foreign government bonds [Member] |  |  |
Fixed maturity securities, Fair Value |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 24,182 | 11,867 |
Fixed maturity securities, Fair Value, More than 12 Months | 0 | 0 |
Fixed maturity securities, Fair Value, Total | 24,182 | 11,867 |
Fixed maturity securities, Gross Unrealized Losses |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 297 | 112 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 0 | 0 |
Fixed maturity securities, Gross Unrealized Losses, Total | 297 | 112 |
Corporate bonds [Member] |  |  |
Fixed maturity securities, Fair Value |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 459,402 | 858,647 |
Fixed maturity securities, Fair Value, More than 12 Months | 57,261 | 50,340 |
Fixed maturity securities, Fair Value, Total | 516,663 | 908,987 |
Fixed maturity securities, Gross Unrealized Losses |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 11,056 | 37,244 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 3,770 | 11,590 |
Fixed maturity securities, Gross Unrealized Losses, Total | 14,826 | 48,834 |
Other mortgage-backed securities [Member] |  |  |
Fixed maturity securities, Fair Value |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 750,557 | 929,268 |
Fixed maturity securities, Fair Value, More than 12 Months | 229,106 | 140,561 |
Fixed maturity securities, Fair Value, Total | 979,663 | 1,069,829 |
Fixed maturity securities, Gross Unrealized Losses |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 13,550 | 19,165 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 5,389 | 1,796 |
Fixed maturity securities, Gross Unrealized Losses, Total | 18,939 | 20,961 |
Total fixed maturity securities [Member] |  |  |
Fixed maturity securities, Fair Value |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 1,938,249 | 2,265,296 |
Fixed maturity securities, Fair Value, More than 12 Months | 299,530 | 216,134 |
Fixed maturity securities, Fair Value, Total | 2,237,779 | 2,481,430 |
Fixed maturity securities, Gross Unrealized Losses |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 57,125 | 70,989 |
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 13,285 | 18,534 |
Fixed maturity securities, Gross Unrealized Losses, Total | 70,410 | 89,523 |
Equity securities [Member] |  |  |
Fixed maturity securities, Fair Value |  |  |
Fixed maturity securities, Fair Value, 12 Months or Less | 56,676 | 38,764 | [1]
Fixed maturity securities, Fair Value, More than 12 Months | 7,956 | 8,379 | [1]
Fixed maturity securities, Fair Value, Total | 64,632 | 47,143 | [1]
Fixed maturity securities, Gross Unrealized Losses |  |  |
Fixed maturity securities, Gross Unrealized Losses, 12 Months or Less | 4,567 | 3,022 | [1]
Fixed maturity securities, Gross Unrealized Losses, More than 12 Months | 1,007 | 1,308 | [1]
Fixed maturity securities, Gross Unrealized Losses, Total | $ 5,574 | $ 4,330 | [1]
[1] | Includes nonredeemable (perpetual) preferred stocks, common stocks and closed-end funds.

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