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Short-Term Debt - Short Term Debt Summary (Details) (USD $) | Jun. 30, 2013 | Dec. 31, 2012
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Debt Disclosure [Abstract] |  |
Beginning balance |  | $ 1,500,000
Borrowing | 1,100,000 |
Repayments, net of interest charges | (1,482,000) |
Ending balance | $ 1,118,000 |

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