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Investment Securities (Details 1) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011
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Schedule of Amortized cost and estimated fair value of fixed-maturity securities by contractual maturity |  |
Amortized Cost, 2012 | $ 65,202 |
Estimated Fair Value, 2012 | 65,251 |
Amortized Cost, 2013-2016 | 164,741 |
Estimated Fair Value, 2013-2016 | 170,028 |
Amortized Cost, 2017-2021 | 36,474 |
Estimated Fair Value, 2017-2021 | 36,961 |
Amortized Cost, Thereafter | 55,165 |
Estimated Fair Value, Thereafter | 55,771 |
Mortgage-backed securities, Amortized Cost | 19,621 |
Mortgage-backed securities, Estimated Fair Value | 19,556 |
Total fixed-maturity securities, Amortized Cost | 341,203 | 298,978
Total fixed-maturity securities, Estimated Fair Value | $ 347,567 | $ 304,045

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