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Investments (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011
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Summary of amortized cost, gross unrealized gains and losses, and estimated fair value available-for-sale securities |  |
Amortized Cost | $ 38,363 | $ 34,147
Gross Unrealized Gain | 1,883 | 929
Available-for-sale Securities, Gross Unrealized Loss | 105 | 434
Fair Value | 40,141 | 34,642
U.S. Treasury and U.S. government agencies [Member] |  |
Summary of amortized cost, gross unrealized gains and losses, and estimated fair value available-for-sale securities |  |
Amortized Cost | 516 | 509
Gross Unrealized Gain | 56 | 47
Available-for-sale Securities, Gross Unrealized Loss |  |
Fair Value | 572 | 556
Commercial mortgage-backed securities [Member] |  |
Summary of amortized cost, gross unrealized gains and losses, and estimated fair value available-for-sale securities |  |
Amortized Cost | 10,797 | 10,574
Gross Unrealized Gain | 627 | 314
Available-for-sale Securities, Gross Unrealized Loss | 1 | 14
Fair Value | 11,423 | 10,874
Corporate bonds [Member] |  |
Summary of amortized cost, gross unrealized gains and losses, and estimated fair value available-for-sale securities |  |
Amortized Cost | 12,274 | 10,199
Gross Unrealized Gain | 316 | 58
Available-for-sale Securities, Gross Unrealized Loss | 104 | 417
Fair Value | 12,486 | 9,840
State, municipalities, and political subdivisions [Member] |  |
Summary of amortized cost, gross unrealized gains and losses, and estimated fair value available-for-sale securities |  |
Amortized Cost | 10,279 | 9,982
Gross Unrealized Gain | 698 | 393
Available-for-sale Securities, Gross Unrealized Loss |  | 3
Fair Value | 10,977 | 10,372
Other [Member] |  |
Summary of amortized cost, gross unrealized gains and losses, and estimated fair value available-for-sale securities |  |
Amortized Cost | 4,497 | 2,883
Gross Unrealized Gain | 186 | 117
Available-for-sale Securities, Gross Unrealized Loss |  |
Fair Value | 4,683 | 3,000
Equity securities [Member] |  |
Summary of amortized cost, gross unrealized gains and losses, and estimated fair value available-for-sale securities |  |
Amortized Cost | 8,690 | 5,364
Gross Unrealized Gain | 274 | 133
Available-for-sale Securities, Gross Unrealized Loss | 295 | 290
Fair Value | $ 8,669 | $ 5,207

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