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Short-Term Borrowings (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Summary of short-term borrowings |  |
Total | $ 4,571 | $ 8,274
Weighted average interest rate | 0.40% | 0.70%
Federal Funds Purchased [Member] |  |
Summary of short-term borrowings |  |
Total | 200 |
Repurchase Agreements [Member] |  |
Summary of short-term borrowings |  |
Total | $ 4,371 | $ 8,274
Short-term Debt [Member] |  |
Summary of short-term borrowings |  |
End of period interest rate | 0.15% | 0.54%

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